Musnad Ahmad 1166:0

Narrated to us by Muhammad ibn Ja’far, who said: Narrated to us by Shu’bah, from Abu Ishaq, who said: I heard Hani’ ibn Hani’ narrating from ‘Ali, may Allah be pleased with him, that the Prophet, peace and blessings of Allah be upon him, said on the day of the conquest of Makkah: "Do not kill anyone after this day, except one who fights you." And he said: "And whoever enters the house of Abu Sufyan is safe, and whoever closes his door is safe, and whoever enters the Masjid is safe."