That he heard the Messenger of Allah ﷺ say in the year of the Conquest when he was in Mecca: Allah has forbidden the sale of wine, animals which have dead natural death, swine and idols. He was asked: Messenger of Allah, what do you think of the fat of animals which had died a natural death, for it was used for caulking ships, greasing skins, and making oil for lamps? He replies: No, it is forbidden. Thereafter, the Messenger of Allah ﷺ said: May Allah curse the Jews! When Allah declared the fat of such animals lawful, they melted it, then sold it, and enjoyed the price they received. (Using translation from Abū Dāʾūd 3486)  

أَنَّهُ سَمِعَ رَسُولَ اللهِ ﷺ يَقُولُ عَامَ الْفَتْحِ وَهُوَ بِمَكَّةَ «إِنَّ اللهَ وَرَسُولَهُ حَرَّمَ بَيْعَ الْخَمْرِ وَالْمَيْتَةِ وَالْخِنْزِيرِ وَالْأَصْنَامِ» فَقِيلَ يَا رَسُولَ اللهِ أَرَأَيْتَ شُحُومَ الْمَيْتَةِ؛ فَإِنَّهُ تُطْلَى بِهَا السُّفُنُ وَتُدْهَنُ بِهَا الْجُلُودُ وَيَسْتَصْبِحُ بِهَا النَّاسُ فَقَالَ «لَا هُوَ حَرَامٌ» فَقَالَ رَسُولُ اللهِ ﷺ عِنْدَ ذَلِكَ قَاتَلَ اللهُ الْيَهُوَدَ؛ إِنَّ اللهَ لَمَّا حَرَّمَ عَلَيْهِمْ شُحُومَهَا أَجْمَلُوهُ ثُمَّ بَاعُوهُ فَأَكَلُوا ثَمَنَهُ