Abidah al-Salmani (may Allah have mercy on him) narrates from Sayyiduna Ali (may Allah be pleased with him): Do not eat the slaughtered animals of the Christians of Banu Taghlib, for they have held firmly to nothing of their religion except the drinking of wine.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19170