Musannaf Ibn Abi Shayba 27:508

Abdullah ibn Numayr narrated to us, he said: Yahya ibn Sa’id narrated to us, from Sa’id ibn al-Musayyib, he said: I heard Sa’d ibn Abi Waqqas narrating that the Messenger of Allah (may Allah bless him and grant him peace) gathered his parents for him on the day of Uhud.