Abu Hurairah reported,

The Prophet ﷺ said, "Fast when you see it and break your fast when you see it. If it is obscured from you, then complete the count."

Muslim 2515

Sahih

حدثنا عبد الرحمن بن سلام الجمحي حدثنا الربيع يعني ابن مسلم عن محمد وهو ابن زياد

عن أبي هريرة رضي الله عنه

أن النبي ﷺ قال صوموا لرؤيته وأفطروا لرؤيته فإن غمي عليكم فأكملوا العدد

مسلم 2515صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Fasting
Chapter
Obligation of fasting Ramadan upon sighting Hilal and breaking the fast upon sighting Hilal, and that if it is obscured at its beginning or end the month is completed as thirty days
Numbering
Darussalam 2515
Muslim 2515