"I cannot count how many times I heard Allah's Messenger (ﷺ) reciting in the two rakʿahs after Maghrib and the two rakʿahs before Salat al-Fajr: Qul yā ayyuhal kāfirūn (Sūrat al-Kāfirūn), and Qul huwa Allāhu aḥad (Sūrat al-Ikhlāṣ).” Reference: Jami` at-Tirmidhi 431.

Allah's Messenger (SAW) recited in Witr prayer Surat al-A'la (in the first Rak'at), Surat al-Kafirun (in the second Rak'at) and Surat al-Ikhlas (in the third Rak'at). [Reported by Ahmad, Abu Dawud and an-Nasa'i]. The latter added, "And he did not say the Taslim (salutation) except in the last (Rak'at) of them."

Abu Hurairah said “The Prophet (saws) sent ten persons (on an expedition) and appointed ‘Asim bin Thabit their commander. About one hundred men of Hudhail who were archers came out to (attack) them. When ‘Asim felt their presence, they took cover in a hillock. They aid to them “Come down and surrender and we make a covenant and pact with you that we shall not kill any of you”. ‘Asim said “I do not come to the protection of a disbeliever. Then they shot them with arrows and killed ‘Asim in a company of seven persons. The other three persons came down to their covenant and pact. They were Khubaib, Zaid bin Al Lathnah and another man. When they overpowered them, they untied their bow strings and tied them with them”. The third person said “This is the first treachery. I swear by Allaah, I shall not accompany you. In them (my companions) is an example for me. They pulled him, but he refused to accompany them, so they killed him. Khubaib remained their captive until they agreed to kill him. He asked for a razor to shave his pubes. When they brought him outside to kill him. Khubaib said to them “Let me offer two rak’ahs of prayer”. He then said “I swear by Allaah, if you did not think that I did this out of fear. I would have increased (the number of rak’ahs).