Abu Huraira reported God’s messenger as saying, “I swear by God that I ask God’s pardon and turn to him in repentance more than seventy times a day.” Bukhari transmitted it.

I heard Messenger of Allah (PBUH) saying: "By Allah, I seek Allah's forgiveness and repent to Him more than seventy times a day."

[Al-Bukhari].

I heard the Messenger of Allah (PBUH) saying, "I swear by Allah that I seek Allah's Pardon and turn to Him in repentance more than seventy times a day."

[Al-Bukhari].

"By Allah, I seek the forgiveness of Allah, and repent to Him more than seventy times in a day. Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 11/101.

the Messenger of Allah (saas) said: 'I seek the forgiveness of Allah and repent to Him one hundred times each day.'

his grandfather said: "The Messenger of Allah (saas) said: 'I seek the forgivenenss of Allah and repent to Him seventy times each day.'"

The Messenger of Allah (may peace be upon him) recited often these words: Hallowed be Allah and with His praise, I seek the forgiveness of Allah and return to Him. She said: I asked: Messenger of Allah, I see that you often repeat the saying" subhan allahi bihamdihi astag firullahi watubuilaih" whereupon he said: My Lord informed me that I would soon see a sign in my Ummah, so when I see it I often recite (these) words: Hallowed be Allah and with His Praise, I seek forgiveness of Allah and return to Him. Indeed I saw it (when this verse) was revealed:" When Allah's help and victory came, it marked the victory of Mecca, and you see people entering into Allah's religion in troops, celebrate the praise of Thy Lord and ask His forgiveness. Surely He is ever returning to Mercy."

He reported God’s messenger as saying, “Turn, you people, in repentance to God, for I turn in repentance to Him a hundred times a day.” Muslim transmitted it.

a thief who confused to a crime but with whom no stolen goods has been found, was brought to the Messenger of Allah. The Messenger of Allah said to him: "I do not think that you stole anything."He He said: "Yes I did." He said: "Take him and cut off his hands, then bring him here, "So they cut off his hand then they brought him to him. He said to him; "Say: I seek the forgiveness of Allah and I repent to Him." He said: "I seek the forgiveness of Allah and I repent to Him." He said:: "O Allah, accept his repentance."(Daif)

There is (at times) some sort of shade upon my heart, and I seek forgiveness from Allah a hundred times a day.

from Abu Salamah, from Abu Hurairah [may Allah be pleased with him] (regarding): 'And seek forgiveness for your sins, and also for the believing men and women (47:19).' That the Messenger of Allah (SAW) said: "Indeed I ask Allah for forgiveness seventy times a day."

“I heard Abu Mundhir, the freed slave of Abu Dharr, say that Abu Umayyah narrated to him, that a thief was brought to the Messenger of Allah (SAW) and he admitted his crime, although the stolen goods were not found with him. The Messenger of Allah (SAW) said: 'I do not think you stole them.’ He said: 'Yes I did.' Then he said (again): ‘I do not think that you stole them.’ and he said: 'Yes I did.' Then he ordered that his hand be cut off. The Prophet (SAW) ' Say: I seek Allah's forgiveness and I repent to Him.' So he (the thief) said: 'I seek Allah's forgiveness and I repent to him.' He (the Prophet (SAW) said twice: 'O Allah! Accept his repentance.”

Abu Umayya al-Makhzumi told that a robber who had made acknowledgment was brought to the Prophet, but no goods were found with him. God’s Messenger said to him, “I do not think you have stolen.” He replied that he had and repeated it to him twice or thrice, making acknowledgment all the time, so he gave orders and his hand was cut off. He was then brought to him and God’s Messenger said to him, “Ask God’s pardon and turn to Him in repentance.” He said, “I ask God’s pardon and turn to Him in repentance.” God's Messenger then said three times, “O God, forgive him.” Abu Dawud, Nasa’i, Ibn Majah and Darimi transmitted it. Thus did I find it in the four texts quoted, in Jami' al-usul, Shu'ab al-iman, and Ma'alim as-sunan on the authority of Abu Umayya, but in the texts of al-Masabih it is given on the authority of Abu Rimtha.* *This is the kind of misunderstanding which can easily arise owing to the similarity of امیۃ and رمثۃ if not carefully written.

Astaghfirullāha wa atūbu ilayh. I seek the forgiveness of Allah and repent to Him. (Recite one hundred times in Arabic during the day.) Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 11/101, Muslim 4/2075.

After the revelation of (the Surah) "When the Help of Allah comes (to you, O Muhammad (PBUH) against your enemies) and the Conquest (of Makkah)" (110:1), Messenger of Allah (PBUH) used to recite in every prayer: "Subhanaka Rabbana wa bihamdika, Allahum-maghfir li (Far removed You are from every imperfection, our Rubb, and all praise is for You, forgive me, O Allah)".

[Al-Bukhari and Muslim].

Another narration is: Messenger of Allah (PBUH) recited frequently in bowing and prostration: "Subhanaka Rabbana wa bihamdika, Allahum-maghfir li. (Far removed You are from every imperfection, our Rubb, and all praise is for You, forgive me, O Allah)". He elucidated that it has been commanded in the Noble Qur'an to recite: "So glorify the Praises of your Rubb, and ask for His forgiveness. Verily, He is the One Who accepts the repentance and Who forgives". (V.110:1) And he (the Messenger of Allah) acted upon it.

According to the narration in Muslim, Messenger of Allah (PBUH) frequently recited these words just before he passed away: "Subhanaka Rabbana wa bihamdika. Astaghfiruka wa atubu ilaika." I ('Aishah (May Allah be pleased with her) asked him: "O Messenger of Allah! What are these new words which I hear from you repeatedly." He replied, "A sign has been appointed for me relating to my people that I should repeat these words at the sight of that sign". Then he recited Surat An-Nasr.

Another narration in Muslim related from 'Aishah (May Allah be pleased with her) is: Messenger of Allah (PBUH) often recited, "Glory be to Allah and praise be to Him; I seek forgiveness of Allah and turn to Him in repentance." I said to him: "O Messenger of Allah, I hear you recite frequently: 'O Allah, You are free from every imperfection our Rubb and all praise is for You; I seek forgiveness of Allah and turn to Him in repentance."' He replied, "My Rubb has informed me that I would soon see a sign regarding my people, whenever I see it, I repeat this statement more often (of His Glorification and Praise and beg pardon of Him and turn to Him). Now I have witnessed the sign. The revelation of Surat An-Nasr and the victory is the conquest of Makkah."

"When there comes the Help of Allah (to you, O Muhammad (PBUH) against your enemies) and the Conquest (of Makkah). And you see that the people enter Allah's religion (Islam) in crowds. So glorify the Praises of your Rubb, and ask His forgiveness. Verily, ...

O people, seek repentance from Allah. Verily, I seek repentance from Him a hundred times a day.

The Messenger of Allah (saws) said: My heart is invaded by unmindfulness, and I ask Allah's pardon a hundred times in the day.

The Messenger of Allah (PBUH) said, "Sometimes I perceive a veil over my heart, and I supplicate Allah for forgiveness a hundred times in a day."

[Muslim].

The Prophet (saws) said: If anyone says: "I ask pardon of Allah than Whom there is no deity, the Living, the eternal, and I turn to Him in repentance," he will be pardoned, even if he has fled in time of battle.

Al-Agharr al-Muzani reported God’s messenger as saying, “My heart is invaded by unmindfulness, and I ask God’s pardon a hundred times in the day.” Muslim transmitted it.

A thief who had accepted (having committed theft) was brought to the Prophet (saws), but no good were found with him. The Messenger of Allah (saws), said to him: I do not think you have stolen. He said: Yes, I have. He repeated it twice or thrice. So he gave orders. His hand was cut off and he was then brought to him. He said: Ask Allah's pardon and turn to Him in repentance. He said: I ask Allah's pardon and turn to Him in repentance. He (the Prophet) then said: O Allah, accept his repentance.

Abu Dawud said: It has been transmitted by 'Amr b. Asim, from Hammam, from Ishaq b. 'Abd Allah from Abu Ummayyah, a man of the Ansar from the Prophet (saws).

Bilal b. Yasar b. Zaid, the Prophet’s client,1 told on his father’s authority that his grandfather said he had heard God's messenger state that if anyone says, “I ask pardon of God than whom there is no god, the Living, the Eternal, and I turn to Him in repentance,” he will be pardoned, even if he has fled in time of battle. 1. The client was Zaid, Bilal’s grandfather. Tirmidhi and Abu Dawud transmitted it; but Abu Dawud has Hilal b. Yasar, and Tirmidhi calls this a gharib tradition.

The Messenger of Allah (PBUH) said, "He who says: 'Astaghfir ullah-alladhi la ilaha illa Huwal-Haiyul-Qayyumu, wa atubu ilaihi (I seek the forgiveness of Allah, there is no true god except Allah, the Ever-Living, the Self- Subsisting, and I turn to Him in repentance),' his sins will be forgiven even if he should have run away from the battlefield (while he was engaged in fighting for the Cause of Allah)."

[Abu Dawud, At-Tirmidhi and Al-Hakim (on conditions of Al-Bukhari and Muslim for accepting Hadith)].

Abu Sa'id reported God's messenger as saying that if anyone says three times when going to bed, "I ask the forgiveness of God than whom there is no god, the Living, the Eternal, and I turn in repentance to Him," God will forgive him his sins, even if they are like the foam of the sea, or in number like the sand which is accumulated,* or as many as the leaves of the trees, or as numerous as the days of this world. *The word is ‘alij. Some say ‘Alij is a place in the desert, the translation being ‘the sand of ‘Alij; others treat it as translated above. Tirmidhi transmitted it, saying this is a gharib tradition.

"It is a heavy thing for my heart if I do not seek Allah's forgiveness a hundred times a day." Reference: Muslim 4/2075. Ibn 'Athir explains that the Prophet (SAW) was always vigilant in his remembrance and drawing near to Allah, and if he forgot to do any of what he normally did from time to time, or it slipped his mind, he felt as if he had wronged himself and so he would begin to seek the forgiveness of Allah. See Jami'ul-'Usool 4/386.