Jami` at-Tirmidhi 2552

Suhaib narrated concerning His (Allah's) statement:For those who do good is the best (reward) and even more- the Prophet (s.a.w) said: "When the people of Paradise enter Paradise, a caller shall call out: 'Indeed you have a promise with Allah.' They will say: 'Did he not whiten our faces, save us from the Fire, and admit us into Paradise?' They will say: 'Indeed.' Then the Veil shall be lifted." He said: "So, by Allah, He did not grant them anything more beloved to them than looking at Him