Musannaf Ibn Abi Shayba 13:2165

Abu Bakr narrated to us, he said: Hafs narrated to us, from Zakariya, from Humayd, he said: I went forward with my father to Shurayh, and I heard him judge by the *khas* (palm-leaf stalks) to the one who possessed the *qamat* (bundles/binding).