Musannaf Ibn Abi Shayba 33:175

Affan narrated to us, he said: Hammad bin Salamah narrated to us, he said: Thabit informed us, from Anas, that the Messenger of Allah (may Allah bless him and grant him peace) said: "The person who had the most severe trials in the world among the people of Paradise will be brought, and Allah will say: 'Dip him one dip into Paradise.' He will be dipped into it one dip, then Allah will say: 'O son of Adam, have you ever seen any misery or anything you disliked?' He will say: 'No, by Your Might, I have never seen anything I disliked at all.' Then the person who had the most luxury in the world among the people of Hell will be brought, and He will say: 'Dip him one dip into Hell.' He will be dipped into it one dip, then He will say: 'O son of Adam, have you ever seen any delight?' He will say: 'No, by Your Might, I have never seen any good at all.'"