Sunan Abi Dawud 615
سنن أبي داود#615SahihNarrated Al-Bara' ibn Azib: When we would pray behind the Messenger of Allah (ﷺ), we liked to be on his right side. He (the Prophet) would sit turning his face towards us (and back towards the Ka'bah) (ﷺ)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Muslim (709)
In-book reference: 2:225