Musannaf Ibn Abi Shayba 19:684

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sa’id ibn Bashir, from Qatadah, from Jabir ibn Zayd and Sa’id ibn al-Musayyib regarding the Jewess or the Christian woman who is under a Muslim [man] and then commits adultery. They both said: She is to be stoned.