Sahih Al Bukhari Hadith Number 1152

Narrated `Abdullah bin `Amr bin Al-`As: Allah’s Messenger (peace be upon him) said to me, “O `Abdullah! Do not be like so and so who used to pray at night and then stopped the night prayer.”

19  Prayer at Night (Tahajjud)
Hadith number 1152
Volume no 2
Chapter: 19 (It is disliked for a person to leave the night Salat)