Yahya related to me from Malik from Hisham ibn Urwa from his father from Zaynab bint Abi Salama from Umm Salama, the wife of the Prophet, may Allah bless him and grant him peace, that the Messenger of Allah, may Allah bless him and grant him peace, said, "I am but a man to whom you bring your disputes. Perhaps one of you is more eloquent in his proof than the other, so I give judgement according to what I have heard from him. Whatever I decide for him which is part of the right of his brother, he must not take any of it, for I am granting him a portion of the Fire."

Malik related to me from Yahya ibn Said from Said ibn al-Musayyab that Umar ibn al-Khattab had a dispute brought to him between a muslim and a jew. Umar saw that the right belonged to the jew and decided in his favour. The jew said to him, "By Allah! You have judged correctly.'' So Umar ibn al-Khattab struck him with a whip and said, "How can you be sure." The jew said to him, "We find that there is no judge who judges correctly but that there is an angel on his right side and an angel on his left side who guide him and give him success in the truth as long as he is with the truth. When he leaves the truth, they rise and leave him."

Yahya related to us from Malik from Ibn Shihab from Humayd ibn Abd ar-Rah man ibn Awf and from Muhammad ibn an-Numan ibn Bashir that they related to him that an-Numan ibn Bashir said that his father Bashir brought him to the Messenger of Allah, may Allah bless him and grant him peace, and said, "I have given this son of mine one of my slaves." The Messenger of Allah, may Allah bless him and grant him peace, said, "Have you given each of your children the same as this?" He said, "No." The Messenger of Allah, may Allah bless him and grant him peace, said, "Then take the slave back."

Malik related to me from Yahya ibn Said from Amra bint Abd ar- Rahman that Barira came asking the help of A'isha, umm al-muminin. A'isha said, "If your masters agree that I pay them your price in one lump sum and set you free I will do it." Barira mentioned that to her masters and they said, "No, not unless your wala' is ours." Yahya ibn Said added that Amra bint Abd ar-Rahman claimed that A'isha mentioned that to the Messenger of Allah, may Allah bless him and grant him peace, and the Messenger of Allah, may Allah bless him and grant him peace said, "Buy her and set her free. The wala' only belongs to the one who sets free."

Yahya related to me from Malik from Yahya ibn Said that Said ibn al-Musayyub said, "Ibrahim, may Allah bless him and grant him peace, was the first to give hospitality to the guest and the first person to be circumcised and the first person to trim the moustache and the first person to see grey hair. He said, 'O Lord! What is this?' Allah the Blessed, the Exalted, said, 'It is dignity, Ibrahim.' He said, 'Lord, increase me in dignity!' "

Yahya said that he had heard Malik say, "One takes from the moustache until the edge of the lip appears, that is the rim. One does not cut if off completely so that one mutilates oneself."

Malik related to me from Abdullah ibn Dinar saying, "Abdullah ibn Umar and I were at the house of Khalid ibn Uqba who was away at the market. A man came who wanted to speak to Abdullah ibn Umar and I was the only other person present Abdullah ibn Umar called another man so that we were four and said to me and the man whom he had called, 'Go a little way off together, because I heard the Messenger of Allah, may Allah bless him and grant him peace, say, "Two do not converse secretly to the exclusion of another.' "'

The Prophet said, "The example of a believer who recites the Qur'an and acts on it, like a citron which tastes nice and smells nice. And the example of a believer who does not recite the Qur'an but acts on it, is like a date which tastes good but has no smell. And the example of a hypocrite who recites the Qur'an is like a Raihana (sweet basil) which smells good but tastes bitter And the example of a hypocrite who does not recite the Qur'an is like a colocynth which tastes bitter and has a bad smell."

The Prophet said, "The rewards (of deeds) are according to the intention, and everybody will get the reward for what he has intended. So whoever emigrated for Allah's and His Apostle's sake, his emigration was for Allah and His Apostle; and whoever emigrated for worldly benefits, or to marry a woman, then his emigration was for the thing for what he emigrated for." (1)

Allah's Apostle said, "Shall I tell you of the best families among the Ansar?" They (the people) said, "Yes, O Allah's Apostle!" The Prophet said, "The best are Banu- An-Najjar, and after them are Banu `Abdil Ash-hal, and after them are Banu Al-Harith bin Al-Khazraj, and after them are Banu Sa`ida." The Prophet then moved his hand by closing his fingers and then opening them like one throwing something, and then said, "Anyhow, there is good in all the families of the Ansar. "

Allah's Apostle mentioned the greatest sins or he was asked about the greatest sins. He said, "To join partners in worship with Allah; to kill a soul which Allah has forbidden to kill; and to be undutiful or unkind to one's parents." The Prophet added, "Shall I inform you of the biggest of the great sins? That is the forged statement or the false witness." Shu`ba (the sub-narrator) states that most probably the Prophet said, "the false witness."

The Prophet said, "Allah puts an angel in charge of the uterus and the angel says, 'O Lord, (it is) semen! O Lord, (it is now ) a clot! O Lord, (it is now) a piece of flesh.' And then, if Allah wishes to complete its creation, the angel asks, 'O Lord, (will it be) a male or a female? A wretched (an evil doer) or a blessed (doer of good)? How much will his provisions be? What will his age be?' So all that is written while the creature is still in the mother's womb."

A bedouin came to Allah's Apostle and said, "My wife has delivered a black child." The Prophet said to him, "Have you camels?" He replied, "Yes." The Prophet said, "What color are they?" He replied, "They are red." The Prophet further asked, "Are any of them gray in color?" He replied, "Yes." The Prophet asked him, "Whence did that grayness come?" He said, "I thing it descended from the camel's ancestors." Then the Prophet said (to him), "Therefore, this child of yours has most probably inherited the color from his ancestors."

Allah's Apostle finished his prayer after offerings two rak`at only. Dhul-Yaddain asked him whether the prayer had been reduced, or you had forgotten?" The Prophet said, "Is Dhul-Yaddain speaking the truth?" The people said, "Yes." Then Allah's Apostle stood up and performed another two rak`at and then finished prayer with Taslim, and then said the Takbir and performed a prostration similar to or longer than his ordinary prostrations; then he raised his head, said Takbir and prostrated and then raised his head (Sahu prostrations).

Yahya related to me from Malik from Safwan ibn Sulaym from Said ibn Salama of the Bani Azraq from al-Mughira ibn Abi Burda of the tribe of Bani Abd ad-Dar that he had heard Abu Hurayra speak about a man who came to the Messenger of Allah, may Allah bless him and grant him peace, and said, "Messenger of Allah! We travel by sea and we do not carry much fresh water with us so if we do wudu with it we go thirsty. Can we do wudu with seawater?" The Messenger of Allah, may Allah bless him and grant him peace, replied, "lts water is pure, and its dead creatures are halal."

Yahya related to me from Malik from Hisham ibn Urwa from his father from Humran, the mawla of Uthman ibn Affan, that Uthman ibn Affan was once sitting on the Maqaid (the benches surrounding the Madina Mosque, or else a stone near Uthman ibn Affan's house where he sat to discuss with people), when the muadhdhin came and told him that it was time for the asr prayer. He called for water and did wudu. Then he said, "By Allah, I shall tell you something which I would not tell you if it were not in the Book of Allah. I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'If a man does wudu, and makes sure he does it correctly, and then does the prayer, he will be forgiven everything that he does between then and the time when he prays the next prayer.' "

Yahya said that Malik said, "I believe he meant this ayat - 'Establish prayer at the two ends of the day and in some watches of the night. Good actions take away wrong actions. That is a reminder for those who remember.' " (Sura 11 ayat 114).

Yahya related to me from Malik from Abd arRahman ibn Abdullah ibn Abd ar-Rahman ibn Abu Sasaca al-Ansari, and later al-Mazini, that his father told him that Abu Said al-Khudri had said to him, "I see that you love sheep and the desert. When you are among your sheep or in your desert, call the prayer and raise your voice in the adhan, because I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'No jinn or man or anything within range hears the voice of the muadhdhin except that it bears witness for him on the day of rising.' "

Malik related to me from Abdullah ibn Abi Bakr that Abu Talha al- Ansari was praying in his garden when a wild pigeon flew in and began to fly to and fro trying to find a way out. The sight was pleasing to him and he let his eyes follow the bird for a time and then he went back to his prayer but could not remember how much he had prayed. He said, "A trial has befallen me in this property of mine." So he came to the Messenger of Allah, may Allah bless him and grant him peace, and mentioned the trial that had happened to him in his garden and said, "Messenger of Allah, it is a sadaqa for Allah, so dispose of it wherever you wish."

Yahya related to me from Malik from Abu Bakr ibn Umar that Said ibn Yasar said, ''I was travelling with Abdullah ibn Umar on the road to Makka, and fearing that it was nearly dawn. I dismounted and prayed witr. Abdullah said, 'Is there not a model for you in the Messenger of Allah, may Allah bless him and grant him peace?' I said, 'Of course, by Allah!' He said, 'The Messenger of Allah, may Allah bless him and grant him peace, used to pray witr on his camel.' "

Yahya related to me from Malik from Ibn Shihab from Abu Bakr ibn Sulayman ibn Abi Hathma that Umar ibn al-Khattab missed Sulayman ibn Abi Hathma in the subh prayer. In the morning he went to the market, and Sulayman's house was between the market and the Prophet's mosque. He passed ash-Shifa, Sulayman's mother, and said to her, "I did not see Sulayman at subh." She replied, "He spent the night in prayer and his eyes overcame him. Umar said, "I would rather be present at subh than stand the whole night in prayer.

Yahya related to me from Malik from Yahya ibn Said from Muhammad ibn Ibrahim that Abd ar-Rahman ibn Abi Amra al-Ansari said that Uthman ibn Affan came to the isha prayer and seeing only a few people in the mosque, he lay down at the back of the mosque to wait for the number of people to increase. Ibn Abi Amra went and sat down beside him and Uthman asked him who he was, so he told him. Uthman said, "What have you memorised of the Qur'an?", and he told him. Uthman said, "If someone is present at isha, it is as if he had stood in prayer for half a night, and if some one is present at subh, it is as if he had stood in prayer for a whole night.

Yahya related to me from Malik that Ziyad ibn Abi Ziyad said that Abu'd-Darda had said, "Shall I not tell you the best of your deeds, and those that give you the highest rank, and those that are the purest with your King, and are better for you than giving gold and silver, and better for you than meeting your enemy and striking their necks?" They said, "Of course." He said, "Remembrance (dhikr) of Allah ta ala."

Yahya related to me from Malik that Yahya ibn Said said that he had heard that when Abu Bakr as-Siddiq was ill he asked A'isha, "How many shrouds did the Messenger of Allah, may Allah bless him and grant him peace, have?" and she replied, "Three pure white cotton garments." Abu Bakr said, "Take this garment (a garment he was wearing on which red clay or saffron had fallen) and wash it. Then shroud me in it with two other garments." A'isha said, "Why's that?", and Abu Bakr replied, "The living have greater need of the new than the dead. This is only for the body fluids that come out as the body decays."

Yahya related to me from Malik from Yahya ibn Said from Muhammad ibn Yahya ibn Habban from al-Qasim ibn Muhammad that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "Sheep from the zakat were brought past Umar ibn al-Khattab and he saw amongst them a sheep with a large udder, ready to give milk, and he said, 'What is this sheep doing here?' and they replied, 'It is one of the sheep from the zakat.' Umar said, 'The owners did not give this sheep willingly. Do not subject people to trials. Do not take from the muslims those of their animals which are the best food-producers.' "

Yahya related to me from Malik from Abu'n Nadr, the mawla of Umar ibn Ubaydullah, from Abu Salama ibn Abd ar-Rahman that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "The Messenger of Allah, may Allah bless him and grant him peace, used to fast for so long that we thought he would never stop fasting, and he would go without fasting for so long that we thought he would never fast again. I never saw the Messenger of Allah, may Allah bless him and grant him peace, fast for a complete month except for Ramadan, and I never saw him do more fasting in any one month than he did in Shaban.'

Ziyad related to me from Malik from Ibn Shihab from Amra bint Abd ar-Rahman from A'isha that the Messenger of Allah, may Allah bless him and grant him peace, once wanted to do itikaf, and when he went off to the place where he wanted to do itikaf he found some tents there, which were A'isha's tent, Hafsa's tent, and Zaynab's tent. When he saw them he asked about them and someone told him that they were the tents of A'isha, Hafsa and Zaynab. The Messenger of Allah, may Allah bless him and grant him peace, said, "Do you think them devout?" Then he left, and did not do itikaf until Shawwal, when he then did it for ten days.

Yahya related to me from Malik, from Nafi, from Nubayh ibn Wahb, who was from the tribe of Bani Abd ad-Dar, that Umar ibn Ubaydullah sent a message to Aban ibn Uthman (who was amir of the hajj at the time), while both of them were in ihram, saying, "I want to marry Bint Shayba ibn Jubayr to Talha ibn Umar and I want you to be present." Aban told him that he should not do that and said, "I heard Uthman ibn Affan say that the Messenger of Allah, may Allah bless him and grant him peace, said, 'A man in ihram should not marry, or give in marriage, or get betrothed.' "

Yahya related to me from Malik, from Ibn Shihab, from Ubaydullah ibn Abdullah ibn Utba ibn Masud, from Abdullah ibn Abbas, that as-Sab ibn Jaththama al-Laythi once gave a wild ass to the Messenger of Allah, may Allah bless him and grant him peace, while he was at al- Abwa, or Waddan, and the Messenger of Allah, may Allah bless him and grant him peace, gave it back to him. However, when the Messenger of Allah, may Allah bless him and grant him peace, saw the expression on the man's face he said, "We only gave it back to you because we are in ihram."

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that the Messenger of Allah, may Allah bless him and grant him peace, entered the Kaba with Usama ibn Zayd, Bilal ibn Rabah and Uthman ibn Talha al-Hajabi and locked it behind him and stayed there for some time.

Abdullah said that he asked Bilal when he came out what the Messenger of Allah had done there and he said, "He positioned himself with one support to his left, two supports to his right, and three behind him (the house had six supports at that time) and then he prayed."

Yahya related to me from Malik that Ata ibn Abdullah al-Khurasani said that an old man from Suq al-Buram in Kufa had related to him that Kab ibn Ujra said, "The Messenger of Allah, may Allah bless him and grant him peace, came to me while I was blowing under a cooking pot belonging to my companions and my head and beard were full of lice. He took my forehead and said, 'Shave your hair and fast three days or feed six poor people.' The Messenger of Allah, may Allah bless him and grant him peace, was aware that I did not have anything with me to sacrifice.'"

Malik said, concerning paying compensation (fidya) for the relief of physical discomfort, "The custom concerning it is that no one pays compensation until he has done something which makes it obligatory to pay compensation just as making amends (kaffara) is only done when it has become obligatory for the one who owes it. The person can pay the compensation wherever he wishes, regardless of whether he has to sacrifice an animal or fast or give sadaqa -- in Makka or in any other town."

Malik said, "It is not correct for a person in ihram to pluck out any of his hair or to shave it or cut it until he has left ihram, unless he is suffering from an ailment of the head, in which case he owes the compensation Allah the Exalted has ordered. It is not correct for a person in ihram to cut his nails, or to kill his lice, or to remove them from his head or from his skin or his garment to the ground. If a person in ihram removes lice from his skin or his garment, he must give away the quantity of food that he can scoop up with both hands. "

Malik said,"Anyone who, while in ihram, plucks out hairs from his nose or armpit or rubs his body with a depilatory agent or shaves the hair from around a head wound out of necessity or shaves his neck for the place of the cupping glasses, regardless of whether it is in forgetfulness or in ignorance, owes compensation in all these instances, and he must not shave the place of the cupping glasses. Someone, who, out of ignorance, shaves his head before he stones the jamra. must also pay compensation."

Yahya related to me from Malik from Nafi that one time Abdullah ibn Umar wanted to sacrifice an animal at Madina. Nafi said, "He told me to buy him an excellent horned ram, then to sacrifice it on the Day of Sacrifice in the place where the people prayed." Nafi continued, "I did so and when the ram was sacrificed, it was carried to Abdullah ibn Umar who shaved his head. He was ill, and did not attend the Id with the people." Nafi added, "Abdullah ibn Umar used to say, 'Shaving the head is not obligatory for someone who sacrifices an animal.' Ibn Umar would do so however."

Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim that his father said about the word of Allah, the Blessed, the Exalted, "There is no fault in you about the proposal you offer to women, or hide in yourselves. Allah knows that you will be mindful of them; but do not make troth with them secretly without honourable words," (Sura 2 ayat 235) that it referred to a man saying to a woman while she was still in her idda after the death of her husband, "You are dear to me, and I desire you, and Allah brings provision and blessing to you," and words such as these.

Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim from his father that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, gave Hafsa bint Abd arRahman in marriage to al-Mundhir ibn az-Zubayr while Abd ar-Rahman was away in Syria. When Abd ar-Rahman arrived, he said, "Shall someone like me have this done to him? Am I the kind of man to have something done to him without his consent?" A'isha spoke to al-Mundhir ibn az-Zubayr, and al-Mundhir said, "It is in the hands of Abd ar-Rahman." Abd ar-Rahman said, "I won't oppose something that you have already completed." Hafsa was confirmed with al-Mundhir, and there was no divorce.

Yahya related to me from Malik from Ibn Shihab from Urwa ibn az- Zubayr that a mawla of the tribe of Banu Adi called Zabra told him that she had been the wife of a slave when she was a slave-girl. Then she was set free and she sent a message to Hafsa, the wife of the Prophet, may Allah bless him and grant him peace. Hafsa called her and said, "I will tell you something., but I would prefer that you did not act upon it. You have authority over yourself as long as your husband does not have intercourse with you. If he has intercourse with you, you have no authority at all." Therefore she pronounced her divorce from him three times.

I heard Allah's Apostle saying, "Allah does not take away the knowledge, by taking it away from (the hearts of) the people, but takes it away by the death of the religious learned men till when none of the (religious learned men) remains, people will take as their leaders ignorant persons who when consulted will give their verdict without knowledge. So they will go astray and will lead the people astray."

(the mother of the believers) Um Sulaim, the wife of Abu Talha, came to Allah's Apostle and said, "O Allah's Apostle! Verily Allah is not shy of (telling you) the truth. Is it necessary for a woman to take a bath after she has a wet dream (nocturnal sexual discharge)?" Allah's Apostle replied, "Yes, if she notices a discharge."

(the wife of the Prophet) I told Allah's Apostle that Safiya bint Huyai had got her menses. He said, "She will probably delay us. Did she perform Tawaf (Al-Ifada) with you?" We replied, "Yes." On that the Prophet told her to depart.

Allah's Apostle said, "When the Adhan is pronounced Satan takes to his heels and passes wind with noise during his flight in order not to hear the Adhan. When the Adhan is completed he comes back and again takes to his heels when the Iqama is pronounced and after its completion he returns again till he whispers into the heart of the person (to divert his attention from his prayer) and makes him remember things which he does not recall to his mind before the prayer and that causes him to forget how much he has prayed."

"When the Mu'adh-dhin pronounced the Adhan, some of the companions of the Prophet would proceed to the pillars of the mosque (for the prayer) till the Prophet arrived and in this way they used to pray two rak`at before the Maghrib prayer. There used to be a little time between the Adhan and the Iqama." Shu`ba said, "There used to be a very short interval between the two (Adhan and Iqama).

Anas bin Malik said, "The Prophet (p.b.u.h) and Zaid bin Thabit took their Suhur together. When they finished it, the Prophet stood for the (Fajr) prayer and offered it." We asked Anas, "What was the interval between their finishing the Suhur and the starting of the morning prayer?" Anas replied, "It was equal to the time taken by a person in reciting fifty verses of the Qur'an."

Allah's Apostle said, "Satan puts three knots at the back of the head of any of you if he is asleep. On every knot he reads and exhales the following words, 'The night is long, so stay asleep.' When one wakes up and remembers Allah, one knot is undone; and when one performs ablution, the second knot is undone, and when one prays the third knot is undone and one gets up energetic with a good heart in the morning; otherwise one gets up lazy and with a mischievous heart."

Allah's Apostle came to us when his daughter died and said, "Wash her thrice or five times or more, if you see it necessary, with water and Sidr and then apply camphor or some camphor at the end; and when you finish, notify me." So when we finished it, we informed him and he gave us his waist-sheet and told us to shroud the dead body in it.

We were (in the funeral procession) of one of the daughters of the Prophet and he was sitting by the side of the grave. I saw his eyes shedding tears. He said, "Is there anyone among you who did not have sexual relations with his wife last night?" Abu Talha replied in the affirmative. And so the Prophet told him to get down in the grave. And so he got down in her grave.

The Prophet collected every two martyrs of Uhud (in one grave) and then he would ask, "Which of them knew the Qur'an more?" And if one of them was pointed out for him as having more knowledge, he would put him first in the Lahd. The Prophet said, "I will be a witness on these on the Day of Resurrection." Then he ordered them to be buried with their blood on their bodies and he did not have them washed.

A funeral procession passed and the people praised the deceased. The Prophet said, "It has been affirmed to him." Then another funeral procession passed and the people spoke badly of the deceased. The Prophet said, "It has been affirmed to him". `Umar bin Al-Khattab asked (Allah's Apostle (p.b.u.h) ), "What has been affirmed?" He replied, "You praised this, so Paradise has been affirmed to him; and you spoke badly of this, so Hell has been affirmed to him. You people are Allah's witnesses on earth."

A man asked, "O Allah's Apostle! What kind of clothes should a Muhrim wear?" Allah's Apostle replied, "He should not wear a shirt, a turban, trousers, a headcloak or leather socks except if he can find no slippers, he then may wear leather socks after cutting off what might cover the ankles. And he should not wear clothes which are scented with saffron or Wars (kinds of Perfumes) . "

Allah's Apostle proceeded from `Arafat and dismounted at the mountainous pass and then urinated and performed a light ablution. I said to him, "(Shall we offer) the prayer?" He replied, "The prayer is ahead of you (i.e. at Al-Muzdalifa)." When he came to Al-Muzdalifa, he performed a perfect ablution. Then Iqama for the prayer was pronounced and he offered the Maghrib prayer and then every person made his camel kneel at his place; and then Iqama for the prayer was pronounced and he offered the (`Isha') prayer and he did not offer any prayer in between them (i.e. Maghrib and `Isha' prayers).

Allah's Apostle stopped (for a while near the Jimar at Mina) during his last Hajj and the people started asking him questions. A man said, "Ignorantly I got my head shaved before slaughtering." The Prophet replied, "Slaughter (now) and there is no harm in it." Another man said, "Unknowingly I slaughtered the Hadi before doing the Rami." The Prophet said, "Do Rami now and there is no harm in it." So, on that day, when the Prophet was asked about anything (about the ceremonies of Hajj) done before or after (its stated time) his reply was, "Do it (now) and there is no harm."

Allah's Apostle said, "Fasting is a shield (or a screen or a shelter). So, the person observing fasting should avoid sexual relation with his wife and should not behave foolishly and impudently, and if somebody fights with him or abuses him, he should tell him twice, 'I am fasting." The Prophet added, "By Him in Whose Hands my soul is, the smell coming out from the mouth of a fasting person is better in the sight of Allah than the smell of musk. (Allah says about the fasting person), 'He has left his food, drink and desires for My sake. The fast is for Me. So I will reward (the fasting person) for it and the reward of good deeds is multiplied ten times."

That the Prophet (saws) said: "Close the door, tie the water-skin, turn over the vessel, or cover the vessel, and extinguish the torch. Indeed Ash-Shaitan does not open what is closed, nor undo what is fastened, nor uncover a vessel, but the small vermin may cause a fire in people's houses."

He said: There are narrations on this topic from Ibn 'Umar, Abu Hurairah, and Ibn 'Abbas.

[Abu 'Eisa said:] This Hadith is Hasan Sahih, and it has been reported through other routes from Jabir.

"The Messenger of Allah (saws) cursed ten involved in wine: The one who presses it, the one who has it pressed, its drinker, its carrier, and the one it is carried to, its server, its seller, the consumption of its price, the one who purchases it and the one it was purchased for."

[Abu 'Eisa said:] This Hadith is Gharib as a narration of Anas. Similar to this has been reported from Ibn 'Abbas, Ibn Mas'ud, and Ibn 'Umar, from the Prophet (saws).

The same tradition has been handed down through a different chain of transmitters.