Musannaf Ibn Abi Shayba 13:3202

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Abu Sulayman al-Taymi, regarding Ibn Sirin, concerning a man who pays off a debt from gambling: He said, "There is no harm in it." And al-Hasan said regarding a man who pays off a debt from usury: "There is no harm in it."