Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: "Every prophet has a supplication that is certainly accepted (whatever he asks, Allah Almighty surely grants it), and I wish to reserve my (such) accepted supplication for intercession for my Ummah in the Hereafter."

Narrated from Sayyiduna Shaddad bin Aws (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The most superior way of seeking forgiveness is (translation): 'O Allah! You are my Lord, there is no true deity except You. You created me and I am Your servant, and I am upon Your covenant and promise as much as I am able. I seek refuge in You from the evil of what I have done. I acknowledge Your favor upon me and I acknowledge my sin, so forgive me, for surely none forgives sins except You.'"

And he said: "Whoever recites this supplication for forgiveness during the day with firm belief in it, and dies before evening, he will enter Paradise. And whoever recites it at night with complete certainty and dies before morning, he will also enter Paradise."

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: "By Allah! I seek forgiveness from Allah and repent to Him more than seventy times a day (that is, at all times)."

`Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrated two hadiths: one he narrated from the Noble Prophet (peace and blessings of Allah be upon him), and the other is his own saying. He said, "A believer considers his sins as if he is sitting under a mountain, fearing that it might fall upon him, while a wicked person considers his sin as if a fly passed over his nose." The narrator Abu Shahab indicated with his hand and then said, "Allah is even more pleased with the repentance of His servant than a person who reaches a place where he fears for his life (where food and the like are not available), and he falls asleep. When he wakes up, he finds that the mount on which his food and drink were kept is lost. Then hunger and thirst overpower him, or as Allah wills (the narrator is in doubt), and he prays (to Allah) that he may reach his home. Then (at the same place where he was lying) he goes to sleep, and when he wakes up suddenly, he sees that his mount (with all the provisions) is with him."

It is narrated from Sayyiduna Hudhaifah bin Yaman (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings of Allah be upon him) would go to his bed, he would recite this supplication: "(O Allah! In Your name I die and I live.)" And when he would wake up, he would recite this supplication: "All praise is for Allah who gave us life after causing us to die (i.e., sleep), and to Him is the return (after rising from the graves)."

Narrated from Sayyiduna Bara’ bin ‘Azib (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings of Allah be upon him) would go to bed to sleep, he would lie on his right side and recite this supplication:“O Allah, I have submitted my soul to You, I have turned my face fully towards You, I have entrusted all my affairs to You, my reliance is upon You, I desire only Your grace and mercy, and there is no refuge or escape from Your punishment except with You. I believe in Your Book which You have revealed and in Your Prophet (peace and blessings of Allah be upon him) whom You have sent.”

Narrated Ibn Abbas (may Allah be pleased with them): Once I stayed overnight at the house of Umm al-Mu'minin Maymunah (may Allah be pleased with her), and he mentioned the whole hadith which has already been mentioned (see the Book: Description of Wudu... Chapter: Reciting the Qur'an after breaking Wudu without performing Wudu), and in this hadith he further says that the supplication which the Prophet (peace and blessings of Allah be upon him) used to recite included these words: "O Allah! Place light in my heart, light in my eyes, light in my ears, light on my right, light on my left, light above me, light beneath me, and make light for me all around (that is, grant me light in every direction)."

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When any of you comes to his bed to sleep, he should dust it off, for he does not know what may have entered it after he left. Then he should recite this supplication: 'My Lord! In Your blessed name I lay my side on the bed, and in Your blessed name I will lift it (in the future). If You withhold my soul in this state (if I die), then have mercy on it, and if You release it, then protect it (from sins) as You protect Your righteous servants.'"

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When any of you prays, he should ask Allah with certainty (that grant me this thing), and he should not say: If You will, then forgive, and if You will, then have mercy on me. For there is no one who can force or compel Allah."

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The supplication of every person is accepted as long as he does not hasten and say: 'I made supplication (but) it was not accepted.'"