Musannaf Ibn Abi Shayba 19:624

Abu Bakr narrated to us, he said: Ali ibn Mushir narrated to us, from Sa’id, from Qatada, from Jabir ibn Zayd, from Ibn Abbas, regarding four people who testified against a woman for adultery, one of whom was her husband. He said: Her husband shall perform li’an (imprecation), and the three shall be flogged.