Sunan an-Nasa'i 1095
سنن النسائي#1095SahihIt was narrated that Abu Sa'eed Al-Khudri said:"My two eyes saw the traces of water and mud on the forehead and nose of the Messenger of Allah (ﷺ), from his praying Qiyam on the night of the twenty-first
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 12:67