It is narrated from Sayyiduna Abu Musa (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "This Ummah will be gathered (on the Day of Resurrection) in three groups: one group who will enter Paradise without reckoning; a second group whose reckoning will be easy, after which they will enter Paradise; and a third group who will come carrying on their backs sins like mountains. Allah will ask about them - while He knows them better -: Who are these? They (the angels) will say: These are servants from among Your servants. Allah will say: Take their sins off them and place them on the Jews and the Christians, and admit them into Paradise by My mercy." This hadith, from the narration of Harami bin Umarah, is sahih on the condition of the two Shaykhs, but they did not record it. As for Hajjaj bin Nusayr, I mentioned him alongside Harami so that the chain would be elevated (a'la).