[جواهر]

Narrated Anas (may Allah be pleased with him) that Allah's Messenger (peace be upon him) said

One of the most miserable people in the world will be brought from among the people of Paradise. Allah will say (to the angels): Dip him once in Paradise. So they will dip him once in it. Then Allah will ask him: Did you ever face any distress or a thing you hate. He would say: No, by Your Glory! Never did I face anything unpleasant. Then one of the most affluent people of the world will be brought from Hell. Allah will command (the angels:) Dip him once in it. Then He will ask him: O son of Adam! Did you ever enjoy any comfort? (that is, a dip in Hell can make one forget the meaning of comfort).

This Hadith is sound and reported in Musnad Ahmad