Narrated `Abdullah bin Masud: During the lifetime of the Prophet the moon was split into two parts and on that the Prophet said, "Bear witness (to thus).
Hadith Referenceصحيح البخاري / كتاب المناقب / 3636
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة