Musannaf Ibn Abi Shayba 37:120

Ibn ‘Uyaynah narrated to us, from Ibn Abi Najih, from Mujahid, who said: I heard Ibn ‘Amr saying: "It is as if I am looking at him, a small-headed man with thin forearms, standing upon it, demolishing it with his shovel." When Ibn al-Zubayr demolished it, I began to look at the description of Ibn ‘Amr, but I did not see it [in him].