Musnad Ahmad 32:1228

Rawh narrated to us, Hisham bin Abi Abdullah narrated to us, from Qatadah, from Anas bin Malik, that the Prophet of Allah, peace and blessings of Allah be upon him, said: "People will certainly be struck by the scorching of the Fire as a punishment for sins they committed. Then, Allah will cause them to enter Paradise by the grace of His mercy. They will be called 'the Jahannamiyyun' (the Hell-dwellers)."