Sunan an-Nasa’i 1621

It was narrated from Kuraib that 'Abdullah bin 'Abbas told him:He slept at the house of Maimunah the wife of the Prophet (ﷺ), who was his maternal aunt. He said: "I laid down across the mattress an the Messenger of Allah (ﷺ) and his wife lay along it. The Prophet (ﷺ) slept until midnight, or a little before or a little after. The Prophet (ﷺ) woke up and began to rub the sleep from his face with his hand. Then he recited the last ten verses of Surah Al Imran. Then he got up and went to a water skin that was hanging up and performed wudu from it, and he performed wudu well, then he stood up and prayed." Abdullah bin 'Abbas said: "I stood up and did what he had done, then I went and stood beside him. The Messenger of Allah (ﷺ) put his right hand on my neck, and took old of my right hand and tweaked it. Then he prayed two rak'ahs, then two rak'ahs, then two rak'ahs, then two rak'ahs, then two rak'ahs, then two rak'ahs, then he prayed witr.Then he lay down until the Mu'adhdhin came to him and he prayed two brief rak'ahs

It was narrated that Hudhaifah said:"When the Messenger of Allah (ﷺ) got up to pray tahajjud at night, he would brush his teeth with the siwak

It was narrated that Ibn 'Abbas said:"When the Prophet (ﷺ) got up at night to pray Tahajjud, he said: Allahumma, lakal-hamdu anta nurus-samawati wal-ardi wa man fihinna wa lakal-hamdu anta qayyamus-samawati wal ardi wa man fihinna wa lakal-hamdu, anta haqqun wa wa'duka haqqun wal jannatu haqqun wan-nuru haqqun wan-nabiyyuna haqqun wa Muhammadan haqqun, laka aslant wa 'alaika tawakkaltu wa bika amant. ( O Allah, to You be praise, You are the Light of the heavens and earth and whoever is in them. To You be praise, You are the Sustainer of the Heavens and the earth and whoever is in them. To You be praise, You are the Sovereign of the heavens and earth and whoever is in them. To You be praise; You are True, Your promise is true, Paradise is true, Hell is true, the Hour is true, the Prophets are true and Muhammad is true. To You have I submitted, in You I put my trust and in You I have believed.'" Then (one of the narrators) Qutaibah mentioned some words the meaning of which was: "Wa bika khasamtu wa ilaika hakamtu, ighfirli ma quadrate wa ma akhkhartu wa ma a'lantu antal-muqaddimu wa antal-mu'khkhir, la ilaha illa anta wa la hawla wa la quwwata illa billah (And with Your help I argue [with my opponents, the non-believers], and I take You as a judge [to judge between us]. Forgive me my past and future sins and those that I commit openly. You are the One who puts [some people] back and bring [others] forward. There is no God but You and there is no power and no strength except with Allah