Sunan an-Nasa'i 2422
سنن النسائي#2422HasanIt was narrated that Abu Dharr said:"The Messenger of Allah commanded us to fast the three days of Al-Bid, the thirteenth, fourteenth and fifteenth
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahHasan
Al-AlbaniHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 22:333