Abu Bakra reported,

The Prophet ﷺ said, "Fast when you sight the new moon, and break your fast when you sight it. If it is obscured from you, then complete the count as thirty. The month is like this, and like this, and like this," and he gestured with his fingers.

Azami 4325

Hasan

عن أبي بكرة

أن النبي ﷺ قال: صوموا الهلال- لرؤيته، وأفطروا لرؤيته، فإن غم عليكم فأكملوا العدة ثلاثين. والشهر هكذا وهكذا وهكذا وعقد.

الأعظمي 4325حسن
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Fasting
Chapter
Obligation of fasting, its virtue, and its rulings
Section
Obligation of fasting upon sighting Hilal and breaking the fast upon sighting it, and if it is obscured then completing the month as thirty days
Numbering
Jami al-Kamil 4325 (2nd edition)
Azami 4325