كتاب الإيمان
1  
The Book of Faith
(74)
Chapter: The night journey on which the messenger of Allah (saws) was taken up into the heavens and the prayers were enjoined
(74)
باب الإِسْرَاءِ بِرَسُولِ اللَّهِ صلى الله عليه وسلم إِلَى السَّمَوَاتِ وَفَرْضِ الصَّلَوَاتِ ‏‏
Sahih Muslim 162 b

It is narrated on the the outhority of Anas b. Malik that the Messenger of Allah (ﷺ) said:

(the angels) came to me and took me to the Zamzam and my heart was opened and washed with the water of Zamzam and then I was left (at my place).
حَدَّثَنِي عَبْدُ اللَّهِ بْنُ هَاشِمٍ الْعَبْدِيُّ، حَدَّثَنَا بَهْزُ بْنُ أَسَدٍ، حَدَّثَنَا سُلَيْمَانُ بْنُ الْمُغِيرَةِ، حَدَّثَنَا ثَابِتٌ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ أُتِيتُ فَانْطَلَقُوا بِي إِلَى زَمْزَمَ فَشُرِحَ عَنْ صَدْرِي ثُمَّ غُسِلَ بِمَاءِ زَمْزَمَ ثُمَّ أُنْزِلْتُ ‏"‏ ‏.‏
Reference : Sahih Muslim 162b
In-book reference : Book 1, Hadith 317
USC-MSA web (English) reference : Book 1, Hadith 310
  (deprecated numbering scheme)