Musannaf Ibn Abi Shayba 12:371

Waki’ narrated to us, from Sufyan, from Hammad bin Salamah, from Muhammad bin Ziyad, who said: Ibn Umar passed by my father while he was branding [an animal], and he was branding Qudamah bin Maz’un’s [animal]. Ibn Umar said: "Do not brand, do not brand."