Sunan Ibn Majah 1646
سنن ابن ماجه#1646Da'ifIt was narrated that Abu Hurairah said:“The Messenger of Allah (ﷺ) forbade anticipating the fast by fasting one day before sighting (of the crescent).”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 7:9