It is narrated from Ali (may Allah be pleased with him), he said: "Do not eat the animals slaughtered by the Christians of Banu Taghlib, because they have not adhered to any aspect of their religion except drinking wine." (That is, they have abandoned the rest of its practices.)
Hadith Referenceمسند الإمام الشافعي / كتاب الأطعمة والصيد والذبائح / 1534
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