Musannaf Ibn Abi Shayba 7:343

Rawh ibn ‘Ubadah narrated to us, from Ibn Jurayj, who said: Abu al-Zubayr informed me that he heard Sa‘id ibn Jubayr saying: Ibn ‘Abbas said: "If he returns (fā’a), it is an expiation (kaffārah), and if he does not do so, it is one (divorce), and she has more right to herself." Then he brought her near before the ten (days). He said: "There is no expiation upon him."