Musannaf Ibn Abi Shayba 19:526

Abu Bakr narrated to us, he said: Muhammad ibn Maysar narrated to us, from Ibn Jurayj, from ‘Amr ibn Dinar, from ‘Ikrimah: That ‘Umar ibn al-Khattab used to cut the hand from the joint. And ‘Ali used to cut the foot, and ‘Amr gestured toward its middle.