Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: In the year of the Conquest, Sayyiduna al-Abbas bin Abd al-Muttalib (may Allah be pleased with him) brought Sayyiduna Abu Sufyan bin Harb (may Allah be pleased with him), and he accepted Islam at a place called Marr al-Zahran. Sayyiduna al-Abbas (may Allah be pleased with him) said: O Messenger of Allah, Abu Sufyan is a man who loves prestige, so honour him with something. He (peace and blessings be upon him) said: "Yes: whoever enters the house of Abu Sufyan is safe, and whoever shuts his door is also safe."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18277