Musnad Ahmad 3572
Musnad of Abdullah bin Mas'ood
It was narrated that ‘Abdullah (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: “Verily I know the last of the people of Hell to emerge from Hell. (It will be) a man who will come out of it crawling. It will be said to him: "Go and enter Paradise." He will go and enter it. and he will find that the people have already occupied their places, so he will go back and say: 'O Lord, the people have already occupied their places." It will be said, "Do you remember the time you were in (Hell)?" He will say, "Yes." It will be said to him, "Wish (for whatever you want). So he will wish, then it will be said to him: ‘You will have what you wished for and ten times as much as the world.’ He will say: ‘Are You mocking me when You are the Sovereign?” He said: And I saw the Messenger of Allah (ﷺ) smiling so broadly that his molars showed.