Sahih al-Bukhari 1141
Book 19: Prayer at Night (Tahajjud) · Hadith 22
Hadith text
Narrated Anas bin Malik:Sometimes Allah's Messenger (ﷺ) would not fast (for so many days) that we thought that he would not fast that month and he sometimes used to fast (for so many days) that we thought he would not leave fasting throughout that month and (as regards his prayer and sleep at night), if you wanted to see him praying at night, you could see him praying and if you wanted to see him sleeping, you could see him sleeping
Anas bin Malik (رضی اللہ عنہ) bataate hain: Kabhi Allah ke Rasool itne roze rakhte ke humein lagta poore mahine roze rakhte rahenge, aur kabhi itne kam roze rakhte ke humein lagta poore mahine roze nahi chhodenge. (Aur unki namaz aur neend ke baare mein), agar tum unhe raat ko namaz padhte hue dekhna chahte, dekh sakte the, aur agar sote hue dekhna chahte, dekh sakte the.
Sahih al-Bukhari 1141 · Book 19, Hadith 22