Musnad Ahmad 30:1205

Musa ibn Dawud narrated to us, Abd al-Rahman ibn Thabit narrated to us, from Ata ibn Qurrah, from Abdullah ibn Damrah, from Abu Hurayrah, from the Prophet (peace and blessings of Allah be upon him)—Musa was in doubt regarding this—who said: "The offspring of the Muslims are in Paradise; Ibrahim takes care of them."