Al-Abbas ibn AbdulMuttalib brought AbuSufyan ibn Harb to the Messenger of Allah ﷺ in the year of the conquest (of Mecca). So he embraced Islam at Marr az-Zahran. Al-Abbas said to him: Messenger 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.
أَنَّ رَسُولَ اللَّهِ ﷺ عَامَ الْفَتْحِ جَاءَهُ الْعَبَّاسُ بْنُ عَبْدِ الْمُطَّلِبِ بِأَبِي سُفْيَانَ بْنِ حَرْبٍ فَأَسْلَمَ بِمَرِّ الظَّهْرَانِ فَقَالَ لَهُ الْعَبَّاسُ يَا رَسُولَ اللَّهِ إِنَّ أَبَا سُفْيَانَ رَجُلٌ يُحِبُّ هَذَا الْفَخْرَ فَلَوْ جَعَلْتَ لَهُ شَيْئًا قَالَ نَعَمْ مَنْ دَخَلَ دَارَ أَبِي سُفْيَانَ فَهُوَ آمِنٌ وَمَنْ أَغْلَقَ عَلَيْهِ بَابَهُ فَهُوَ آمِنٌ