Musnad Ahmad 27:1224

Abu al-Nadr narrated to us, Abu Aqil narrated to us—Abdullah ibn Ahmad said: My father said: And he is Abdullah ibn Aqil, a righteous narrator, trustworthy—Umar ibn Hamzah narrated to us, from Salim, from his father, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "O Allah, curse so-and-so, O Allah, curse al-Harith ibn Hisham, O Allah, curse Suhayl ibn Amr, O Allah, curse Safwan ibn Umayyah." He said: Then this verse was revealed: {Not for you is the decision whether He should turn in mercy to them or punish them, for they are indeed wrongdoers} [Al Imran: 128]. He said: Then they were all turned to in repentance.