Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) looked towards the sky and then said: "May Allah destroy the Jews; fat was made unlawful for them, so they sold it and began to consume its price. Indeed, when Allah declares something unlawful, He also declares its price unlawful."
Hadith Referenceصحیح ابن حبان / كتاب البيوع / 4938
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «أحاديث البيوع».فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح