Jami` at-Tirmidhi 437
جامع الترمذي#437SahihIbn Umar narrated that:The Prophet (S) said: "Salat in the night is two by two. So when you fear the dawn (is near) then make it odd by one, and make that the last of your Salat odd
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 2:290