Sayyiduna Mu'awiyah (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) say: "O Allah, whomever I cursed in the days of Ignorance (Jahiliyyah) and who then became a Muslim, make that a means for him of drawing near to You."
Al-Tabarani recorded it; its chain contains Sulayman bin Dawud al-Shadhakuni, who is da'if (weak). (Allamah al-Haythami says:) I say: The hadith about the state of Sayyiduna Abu al-Sawwar (may Allah be pleased with him) will come later in the chapter on his virtues.