Sahih Muslim | Book 1 | Hadith Number 310

Narrated by Anas b. Malik
It is narrated on the authority of Anas b. Malik that the Messenger of Allah (may peace be upon him) said: (the angels) came to me and took me to the Zam-Zam and my heart was opened and washed with the water of Zam-Zam and then I was left (at my place).