Sunan an-Nasa'i 2332
سنن النسائي#2332Da'ifIt was narrated from Hafsah that the Prophet said:"Whoever does not have the intention of fasting before dawn, then there is no fast for him." (Daif)
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 ZaiDaif
In-book reference: 22:243