Musannaf Ibn Abi Shayba 16:1041

Abu Bakr narrated to us, he said: Waki’ and Ibn Mahdi narrated to us, from Sufyan, from Abdullah ibn al-Hasan, he said: I heard my mother, Fatimah bint al-Husayn, forbidding *al-qaza’* (shaving part of the head and leaving part of it).