It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "Whoever sleeps through his witr or forgets it, let him pray it when he wakes in the morning or when he remembers it." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Witr is a truth (established duty), so whoever wishes may pray five rak'ahs of witr, whoever wishes may pray three, and whoever wishes may pray one rak'ah." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. Muhammad bin al-Walid al-Zubaydi, Sufyan bin Uyaynah, Sufyan bin Husayn, Ma'mar bin Rashid, Muhammad bin Ishaq and Bakr bin Wa'il corroborated him (mutaba'ah) in narrating it as marfu' (attributed to the Prophet).

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Witr is five, or three, or one (rak'ah)."

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Witr is a truth (established duty), so whoever wishes may pray three rak'ahs of witr, whoever wishes may pray five, and whoever prefers to pray one rak'ah of witr, let him pray just one."

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Pray five rak'ahs of witr; if you cannot, then three; if you cannot, then one; and if you cannot (do even that), then perform (witr) by gestures."

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Witr is a truth (established duty)", then the narrator mentioned (the number of rak'ahs) similar to the hadith above.

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that he said: Witr is a truth (established duty), then the narrator mentioned it similar to the previous hadith (but this narration stops at Abu Ayyub al-Ansari (may Allah be pleased with him), being mawquf).

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Witr is a truth (established duty)", then the narrator mentioned the hadith with a meaning similar to the previous one. Imam al-Hakim says: I have no doubt that the two Shaykhs left this hadith only because some of the students of Imam al-Zuhri narrated it as mawquf (stopping at the Companion), whereas this is not something that creates a scholarly hidden defect ('illah) or weakness in a hadith like this. And Allah knows best.

It is narrated from Sayyiduna Abu al-Darda' (may Allah be pleased with him) that he said: Often I saw the Prophet (peace and blessings be upon him) praying witr when the people had already stood up for the morning (Fajr) prayer. This hadith has an authentic chain (sahih al-isnad), but the two Shaykhs did not record it.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When one of you wakes in the morning (at Fajr time) and has not prayed witr, let him pray witr." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.