Abu Dawud Book 13, Hadith Number 3015.

Narated By Abdullah ibn Abbas : Al-Abbas ibn AbdulMuttalib brought AbuSufyan ibn Harb to the Apostle of Allah (PBUH) in the year of the conquest (of Mecca). So he embraced Islam at Marr az-Zahran. Al-Abbas said to him: Apostle of Allah, AbuSufyan is a man who likes taking this pride, if you may do something for him. He said: Yes, he who enters the house of AbuSufyan is safe, and he who closes his door is safe.