It's narrated that AbdurRahman bin AlQasim said "Then it is not (permissible) for anyone after the Prophet ﷺ to say 'Go and kill him, but then you will be like him.' "

Allah's Apostle sent a Sariya of ten men as spies under the leadership of `Asim bin Thabit al-Ansari, the grandfather of `Asim bin `Umar Al-Khattab. They proceeded till they reached Hadaa, a place between 'Usfan, and Mecca, and their news reached a branch of the tribe of Hudhail called Bani Lihyan. About two-hundred men, who were all archers, hurried to follow their tracks till they found the place where they had eaten dates they had brought with them from Medina. They said, "These are the dates of Yathrib (i.e. Medina), "and continued following their tracks When `Asim and his companions saw their pursuers, they went up a high place and the infidels circled them. The infidels said to them, "Come down and surrender, and we promise and guarantee you that we will not kill any one of you" `Asim bin Thabit; the leader of the Sariya said, "By Allah! I will not come down to be under the protection of infidels. O Allah! Convey our news to Your Prophet. Then the infidels threw arrows at them till they martyred `Asim along with six other men, and three men came down accepting their promise and convention, and they were Khubaib-al-Ansari and Ibn Dathina and another man So, when the infidels captured them, they undid the strings of their bows and tied them. Then the third (of the captives) said, "This is the first betrayal. By Allah! I will not go with you. No doubt these, namely the martyred, have set a good example to us." So, they dragged him and tried to compel him to accompany them, but as he refused, they killed him. They took Khubaid and Ibn Dathina with them and sold them (as slaves) in Mecca (and all that took place) after the battle of Badr. Khubaib was bought by the sons of Al-Harith bin 'Amir bin Naufal bin `Abd Manaf. It was Khubaib who had killed Al-Harith bin 'Amir on the day (of the battle of) Badr. So, Khubaib remained a prisoner with those people. Narrated Az-Zuhri: 'Ubaidullah bin 'Iyyad said that the daughter of Al-Harith had told him, "When those people gathered (to kill Khubaib) he borrowed a razor from me to shave his pubes and I gave it to him. Then he took a son of mine while I was unaware when he came upon him. I saw him placing my son on his thigh and the razor was in his hand. I got scared so much that Khubaib noticed the agitation on my face and said, 'Are you afraid that I will kill him? No, I will never do so.' By Allah, I never saw a prisoner better than Khubaib. By Allah, one day I saw him eating of a bunch of grapes in his hand while he was chained in irons, and there was no fruit at that time in Mecca." The daughter of Al-Harith used to say, "It was a boon Allah bestowed upon Khubaib." When they took him out of the Sanctuary (of Mecca) to kill him outside its boundaries, Khubaib requested them to let him offer two rak`at (prayer). They allowed him and he offered Two rak`at and then said, "Hadn't I been afraid that you would think that I was afraid (of being killed), I would have prolonged the prayer. O Allah, kill them all with no exception." (He then recited the poetic verse):-- "I being martyred as a Muslim, Do not mind how I am killed in Allah's Cause, For my killing is for Allah's Sake, And if Allah wishes, He will bless the amputated parts of a torn body" Then the son of Al Harith killed him. So, it was Khubaib who set the tradition for any Muslim sentenced to death in captivity, to offer a two-rak`at prayer (before being killed). Allah fulfilled the invocation of `Asim bin Thabit on that very day on which he was martyred. The Prophet informed his companions of their news and what had happened to them. Later on when some infidels from Quraish were informed that `Asim had been killed, they sent some people to fetch a part of his body (i.e. his head) by which he would be recognized. (That was because) `Asim had killed one of their chiefs on the day (of the battle) of Badr. So, a swarm of wasps, resembling a shady cloud, were sent to hover over `Asim and protect him from their messenger and thus they could not cut off anything from his flesh.

The person who killed Khubaib was Abu Sarua (i.e. `Uqba bin Al-Harith).

The Prophet said, "Abusing a Muslim is Fusuq (an evil doing) and killing him is Kufr (disbelief)."

The Prophet, said, "Abusing a Muslim is Fusuq (evil doing) and killing him is Kufr (disbelief).

Allah's Apostle said, "It is not sinful of a Muhrim to kill five kinds of animals."

The Prophet (saws) said: Kill the two black things during prayer, the snake and scorpion.

I said, "O Allah's Apostle! I let loose my hound after a game and mention Allah's Name on sending it." The Prophet said, "If you let loose your hound after a game and you mention Allah's Name on sending it and the hound catches and kills the game and eats of it, then you should not eat of it, for it has killed it for itself." I said, "Sometimes when I send my hound after a game, I find another hound along with it and I do not know which of them has caught the game." He said, "You must not eat of it because you have not mentioned, the Name of Allah except on sending your own hound, and you did not mention it on the other hound." Then I asked him about the game hunted with a Mi'rad (i.e. a sharp edged piece of wood or a piece of wood provided with a sharp piece of iron used for hunting). He said, "If the game is killed with its sharp edge, you can eat of it, but if it is killed by its broad side (shaft), you cannot eat of it, for then it is like an animal beaten to death with a piece of wood."

AbdurRahman ibn Samurah said: I was holding the hand of Ibn Umar on one of the ways of Medina. He suddenly came to a hanging head. He said: Unhappy is the one who killed him. When he proceeded, he said: I do not consider him but unfortunate. I heard the Messenger of Allah (saws) say: If anyone goes to a man of my community in order to kill him, he should say in this way, the one who kills will go to Hell and the one who is killed will go to Paradise.

Abu Dawud said: Al-Thawri has transmitted it from 'Awn from 'Abd al-Rahman b. Sumair or Sumairah ; and Laith b. Abu Sulaim transmitted it from 'Awn from 'Abd al-Rahman b. Sumairah.

Abu Dawud said: Al-Hasan b. 'Ali said to me: Abu al-Walid transmitted this tradition to us from Abu 'Awanah, and said: It (the name Ibn Samurah) is in my notebook Ibn Sabrah. The people also transmitted it as Samurah and Sumairah. These are wordings of Abu al-Walid.

The Prophet (saws) said: The most merciful of the people in respect of killing are believers (in Allah).

The Prophet (saws) said: Kill the old men who are polytheists, but spare their children.

On the day of Badr, the Prophet said, "Who will go and see what has happened to Abu Jahl?" Ibn Mas`ud went and found that the two sons of 'Afra had struck him fatally. `Abdullah bin Mas`ud got hold of his beard and said, "'Are you Abu Jahl?" He replied, "Can there be a man more superior to one whom his own folk have killed (or you have killed)?"

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."

Some Zanadiqa (atheists) were brought to `Ali and he burnt them. The news of this event, reached Ibn `Abbas who said, "If I had been in his place, I would not have burnt them, as Allah's Apostle forbade it, saying, 'Do not punish anybody with Allah's punishment (fire).' I would have killed them according to the statement of Allah's Apostle, 'Whoever changed his Islamic religion, then kill him.'"

While we were in the company of the Prophet in a cave at Mina, when Surat-wal-Mursalat were revealed and he recited it and I heard it (directly) from his mouth as soon as he recited its revelation. Suddenly a snake sprang at us and the Prophet said (ordered us): "Kill it." We ran to kill it but it escaped quickly. The Prophet said, "It has escaped your evil and you too have escaped its evil."

Another chain narrates with the addition of "and the drowned is a martyr."

Yahya related to me from Zayd ibn Aslam that his father said that he had heard Umar ibn al-Khattab say, "I once gave a noble horse to carry somebody in the way of Allah, and the man neglected it. I wished to buy it back from him and I thought that he would sell it cheaply. I asked the Messenger of Allah, may Allah bless him and grant him peace, about it and he said, 'Do not buy it, even if he gives it to you for one dirham, for someone who takes back his sadaqa is like a dog swallowing its own vomit.' "

Allah's Apostle said, "Abusing a Muslim is Fusuq (i.e., an evil-doing), and killing him is Kufr (disbelief).

The Prophet said, "Kill the snake with two white lines on its back, for it blinds the on-looker and causes abortion."

Allah's Apostle ordered that the salamander should be killed and said, "It (i.e. the salamander) blew (the fire) on Abraham."

The Prophet (saws) prohibited to kill four creatures: ants, bees, hoopoes, and sparrow-hawks.

When it was the day of (the battle of) Hunain, I saw a Muslim man fighting with one of the pagans and another pagan was hiding himself behind the Muslim in order to kill him. So I hurried towards the pagan who was hiding behind the Muslim to kill him, and he raised his hand to hit me but I hit his hand and cut it off. That man got hold of me and pressed me so hard that I was afraid (that I would die), then he knelt down and his grip became loose and I pushed him and killed him. The Muslims (excepting the Prophet and some of his companions) started fleeing and I too, fled with them. Suddenly I met `Umar bin Al-Khattab amongst the people and I asked him, "What is wrong with the people?" He said, "It is the order of Allah" Then the people returned to Allah's Apostle (after defeating the enemy). Allah's Apostle said, "Whoever produces a proof that he has killed an infidel, will have the spoils of the killed man." So I got up to look for an evidence to prove that I had killed an infidel, but I could not find anyone to bear witness for me, so I sat down. Then it came to my mind (that I should speak of it) and I mentioned the case to Allah's Apostle. A man from the persons who were sitting with him (i.e. the Prophet), said, "The arms of the deceased one whom he ( i.e. Abu Qatada) has mentioned, are with me, so please compensate him for it (i.e. the spoils)," Abu Bakr said, "No, Allah's Apostle will not give it (i.e. the spoils) to a weak humble person from Quraish and leave one of Allah's Lions who fights on behalf of Allah and His Apostle." Allah's Apostle then got up and gave that (spoils) to me, and I bought with it, a garden which was the first property I got after embracing Islam.

The Prophet said, "Who is ready to kill Ka`b bin Al-Ashraf who has really hurt Allah and His Apostle?" Muhammad bin Maslama said, "O Allah's Apostle! Do you like me to kill him?" He replied in the affirmative. So, Muhammad bin Maslama went to him (i.e. Ka`b) and said, "This person (i.e. the Prophet) has put us to task and asked us for charity." Ka`b replied, "By Allah, you will get tired of him." Muhammad said to him, "We have followed him, so we dislike to leave him till we see the end of his affair." Muhammad bin Maslama went on talking to him in this way till he got the chance to kill him.

The Prophet said, "Who will go and see what has happened to Abu Jahl?" Ibn Mas`ud went and found that the two sons of 'Afra had struck him fatally (and he was in his last breaths). `Abdullah bin Mas`ud said, "Are you Abu Jahl?" And took him by the beard. Abu Jahl said, "Can there be a man superior to one you have killed or one whom his own folk have killed?"

When the Prophet went out for (the battle of) Uhud, some of his companions (hypocrites) returned (home). A party of the believers remarked that they would kill those (hypocrites) who had returned, but another party said that they would not kill them. So, this Divine Inspiration was revealed: "Then what is the matter with you that you are divided into two parties concerning the hypocrites." (4.88) The Prophet said, "Medina expels the bad persons from it, as fire expels the impurities of iron."

When this verse was revealed: "If they do come to thee, either judge between them, or decline to interfere....If thou judge, judge in equity between them." Banu an-Nadir used to pay half blood-money if they killed any-one from Banu Qurayzah. When Banu Qurayzah killed anyone from Banu an-Nadir, they would pay full blood-money. So the Messenger of Allah (saws) made it equal between them.

One of the two women of Hudhayl killed the other, Each of them had husband and sons. The Messenger of Allah (saws) fixed the blood-wit for the slain woman to be paid by the woman's relatives on the father's side. He declared her husband and the child innocent. The relatives of the woman who killed said: We shall inherit from her. The Messenger of Allah (saws) said: No, her sons and her husband should inherit from her.

Allah's Apostle called the salamander a bad animal, but I did not hear him ordering it to be killed."

At the battle of Badr the Messenger of Allah gave me AbuJahl's sword, as I had killed him.

The Prophet (saws) said: I will not forgive anyone who kills after accepting blood-wit

Yahya related to me from Malik that Rabia ibn Abi Abd ar-Rahman said, "The slave of fair complexion and excellence is estimated at fifty dinars or six hundred dirhams. The blood-money of a free muslim woman is five hundred dinars or six thousand dirhams."

Malik said, "The blood-money of the foetus of a free woman is a tenth of her blood-money. The tenth is fifty dinars or six hundred dirhams."

Malik said, "I have not heard anyone dispute that there is no slave in compensation for the foetus until it leaves its mother's womb and falls still-born from her womb . "

Malik said, "I heard that if the foetus comes out of its mother's womb alive and then dies, the full blood-money is due for it."

Malik said, "The foetus is not alive unless it cries at birth. If it comes out of its mother's womb and cries out and then dies, the complete blood-money is due for it. We think that the slave- girl's foetus has a tenth of the price of the slave-girl."

Malik said, "When a woman murders a man or woman, and the murderess is pregnant, retaliation is not taken against her until she has given birth. If a woman who is pregnant is killed intentionally or unintentionally, the one who killed her is not obliged to pay anything for her foetus. If she is murdered, then the one who killed her is killed and there is no blood-money for her foetus. If she is killed accidentally, the tribe obliged to pay on behalf of her killer pays her blood-money, and there is no blood-money for the foetus."

Yahya related to me, "Malik was asked about the foetus of the christian or jewish woman which was aborted. He said, 'I think that there is a tenth of the blood-money of the mother for it.' "

The Prophet ordered that a short-tailed or mutilated-tailed snake (i.e. Abtar) should be killed, for it blinds the on-looker and causes abortion."

'Abdullah reported that Allah's Messenger (may peace be upon him) commanded a Muhrim (one who is in the state of pilgrimage) to kill the snake at Mina.