Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates: The people would not look at Sayyiduna Abu Sufyan (may Allah be pleased with him) nor sit with him, so he said to the Prophet (peace and blessings be upon him): There are three things I wish to give you. He (peace and blessings be upon him) said: "Yes." He said: I have the most beautiful and most handsome woman of the Arabs, Umm Habibah bint Abi Sufyan; I will marry her to you. He (peace and blessings be upon him) said: "Yes." He said: And make Mu'awiyah your scribe, keeping him before you. He (peace and blessings be upon him) said: "Yes." He said: And appoint me to fight the disbelievers just as I used to fight the Muslims. He (peace and blessings be upon him) said: "Yes."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12829