Sunan an-Nasa'i 1321
سنن النسائي#1321SahihIt was narrated that Wasi' bin Habban said:"I said to Ibn 'Umar: "Tell me about the prayer of the Messenger of Allah (ﷺ); how was it?" He mentioned the takbir and he mentioned: As-salamu 'alaykum wa rahmatullah (peace be upon you and the mercy of Allah) to his right and: As-salamu 'alaykum (peace be upon you) to his left
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahHasan Sahih
Al-AlbaniHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 13:143