Sunan an-Nasa'i 4189
سنن النسائي#4189SahihIt was narrated that Jarir bin 'Abdullah said:"I gave my pledge to the Prophet to hear and obey, and he told me to add the words.' In as much as you can, and to be since toward every Muslim"'. (Sahih)
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 ZaiHasan
In-book reference: 39:41