Musannaf Ibn Abi Shayba 28:165

Waki' narrated to us, he said: Sufyan narrated to us, from Abu Ishaq, from Qays ibn Sakan al-Asadi, who said: Abdullah said: "You have settled between the Persians and the Nabataeans. So, when you buy meat, ask [about it]. If it is the slaughter of a Jew or a Christian, then eat it. But if a Magian slaughtered it, then do not eat it."