Sahih Muslim Book 39, Hadith Number 6728.
Chapter : The splitting up of the Moon (a great miracle).
Anas reported that the people of Mecca demanded from Allah’s Messenger (may peace be upon him) that he should show them (some) signs (miracles) and he showed them the splitting of the moon. This hadith has been narrated on the authority of Anas through another chain of transmitters.