Sunan an-Nasa'i 2432
سنن النسائي#2432Da'ifAbdul-Malik bin Qudamah bin Milhan narrated that his father said:"The Messenger of Allah used to command us to fast the three days with the shining bright nights (Al-Ayam 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 GhuddahDaif
Al-AlbaniDaif
Zubair Ali ZaiDaif
In-book reference: 22:343