Sunan Abi Dawud 2454
سنن أبي داود#2454Da'ifNarrated Hafsah, Ummul Mu'minin: The Messenger of Allah (ﷺ) said: He who does not determine to fast before dawn does not fast
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiDaif
In-book reference: 14:142