Sahih Muslim 2516

صحيح مسلم#2516Sahih

Abu Huraira reported Allah's Messenger (ﷺ) as saying:Observe fast on sighting it (the new moon) and break it on sighting it. But if (due to clouds) the actual position of the month is concealed from you, you should then count thirty (days)

Scholarly Authentication

We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:

Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.

In-book reference: 13:22

All of Sahih Muslim