Prayer at Night (Tahajjud) 
Bukhari :: Book 2 :: Volume 21 :: Hadith 264
Narrated Abu Qatada bin Rabi Al-Ansari;
The Prophet said, "If anyone of you enters a Mosque, he should not sit until he has offered a two-Rakat prayer."
Prayer at Night (Tahajjud)
Bukhari :: Book 2 :: Volume 21 :: Hadith 264
Narrated Abu Qatada bin Rabi Al-Ansari;
The Prophet said, "If anyone of you enters a Mosque, he should not sit until he has offered a two-Rakat prayer."