Musnad Ahmad 32:1502

'Abd al-Wahhab narrated to us, Sa'id ibn Abi 'Aruba narrated to us, from Qatadah, from Anas ibn Malik, from the Prophet, peace and blessings of Allah be upon him, that he said: "Indeed, when the servant is placed in his grave and his companions turn away from him, he hears the tapping of their sandals. Then two angels come to him and say to him: 'What did you used to say about this man?'—meaning Muhammad, peace and blessings of Allah be upon him. He said: 'As for the believer, he says: I bear witness that he is the servant of Allah and His Messenger.' Then it is said to him: 'Look at your seat in the Fire; Allah has replaced it for you with a seat in Paradise.' So he sees them both."