Musannaf Ibn Abi Shayba 13:1164

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from his father, from al-Musayyab ibn Rafi’, from ‘Abdullah ibn Yazid al-Khatmi regarding the scattering of walnuts: He said: "If you place them, we will obtain from them, and if you scatter them, we will not obtain from them."