Hadith Of Jibreel

Narrated by Abu Huraira: Hadrat Jibrael (a.s.) (who came in the form of a human being) asked the Messenger of Allah (PBUH) : ,

"O Messenger of Allah, what is Ihsan (i.e. perfection or benevolence)?" The Prophet (saws) said, "Ihsan is to worship Allah as if you see Him, and if you do not achieve this state of devotion, then (take it for granted that) Allah sees you."

(Sahih Al-Bukhari Hadith 6.300)