Sahih Al Bukhari Hadith Number 1143

Narrated Samura bin Jundab: The Prophet (peace be upon him) said in his narration of a dream that he saw, “He whose head was being crushed with a stone was one who learnt the Qur’an but never acted on it, and slept ignoring the compulsory prayers.”

19  Prayer at Night (Tahajjud)
Hadith number 1143
Volume no 2
Chapter: 12 (Satan’a tying of knots at the back of the head if one does not offer the ight prayer)