Jami` at-Tirmidhi 24
جامع الترمذي#24SahihAbu Hurairah reported that the :Prophet said: "When on of you awakens in the night, then let him not put his hand into the vessel until he has poured water on two times, or three times, for indeed he does not know where his hand has spent the night
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 ZaiSahih
In-book reference: 1:24