Musnad Ahmad 696:5

Yazid ibn Harun narrated to us, Hammad ibn Salamah informed us, from Thabit al-Bunani, from Abd al-Rahman ibn Abi Layla, from Suhayb, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When the people of Paradise enter Paradise, it will be called out to them: 'O people of Paradise, you have a promise with Allah, a promise which you have not yet seen.' They will say: 'And what is it? Has He not whitened our faces, distanced us from the Fire, and admitted us into Paradise?'" He said: "Then the veil will be lifted, and they will look at Him. By Allah, Allah has not given them anything more beloved to them than that." Then the Messenger of Allah (peace and blessings of Allah be upon him) recited: {For those who have done good is the best [reward] and extra} [Yunus: 26].