Sunan Ibn Majah 751
سنن ابن ماجه#751SahihIt was narrated that Ibn 'Umar said:"We used to sleep in the mosque at the time of the Messenger of Allah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Shuaib Al ArnautSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 4:17