Musannaf Ibn Abi Shayba 3:5636

Abu Bakr narrated to us, he said: Hafs narrated to us, from Ibn Abi Dhi'b, from Muhammad ibn al-Munkadir, he said: The Messenger of Allah (may Allah bless him and grant him peace) said: "If your mother calls you while you are in prayer, answer her. And if your father calls you, do not answer him."