Sunan an-Nasa'i 2221
سنن النسائي#2221SahihIt was narrated that Raja bin Haiwah said:"Abu Umamah Al-Bahili narrated to me: 'I said: O Messenger of Allah, tell me of something by which Allah will benefic me. He said: Take to fasting, for there is nothing like it
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 ZaiIsnaad Sahih
In-book reference: 22:132