Sahih Bukhari Volume 005, Book 058, Hadith Number 208.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 58. Merits of the Helpers in Madina (Ansaar)
Narated By Anas bin Malik : The people of Mecca asked Allah's Apostle to show them a miracle. So he showed them the moon split in two halves between which they saw the Hiram' mountain.