Sunan an-Nasa'i 1869
سنن النسائي#1869SahihIt was narrated that Thabit said:"I heard Anas say: 'The Messenger of Allah said: True patience is that which comes at the first blow
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: 21:52