وَعَنْ عُمَرَ رَضِيَ اللَّهُ عَنْهُ
أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «قَاتَلَ اللَّهُ الْيَهُودَ حُرِّمَتْ عَلَيْهِمُ الشُّحُومُ فجملوها فَبَاعُوهَا»
Umar reported God’s Messenger as saying, “God curse the Jews! Fats were declared unlawful for them, but they melted them and sold them.”
Mishkat al-Masabih 2653, Book 12, Business Transactions, Hadith 9. 1 min read