Prayer at Night (Tahajjud)

Bukhari :: Book 2 :: Volume 21 :: Hadith 225

Narrated Jundab bin 'Abdullah :

Gabriel did not come to the Prophet (for some time) and so one of the Quraish women said, "His Satan has deserted him." So came the Divine Revelation: "By the forenoon And by the night When it is still! Your Lord (O Muhammad) has neither Forsaken you Nor hated you." (93.1-3)