[Machine] I found a sock made of fat on the day of Khaybar, so I picked it up and said, "This is mine, I will not give it to anyone." Then I turned around and saw the Prophet ﷺ smiling, so I felt embarrassed and took it out in the authentic narration as it was before. And in this, it indicates that he allowed the use of fat from the slaughter of the People of the Book. And in that, it indicates the correctness of the statement of Imam Shafi'i, may Allah have mercy on him.  

دُلِّيَ جِرَابٌ مِنْ شَحْمٍ يَوْمَ خَيْبَرَ فَالْتَزَمْتُهُ فَقُلْتُ هَذَا لِي لَا أُعْطِي أَحَدًا شَيْئًا فَالْتَفَتُّ فَإِذَا النَّبِيُّ ﷺ يَتَبَسَّمُ فَاسْتَحْيَيْتُ مِنْهُ أَخْرَجَاهُ فِي الصَّحِيحِ كَمَا مَضَى وَفِي هَذَا مَا دَلَّ عَلَى أَنَّهُ أَبَاحَ الشَّحْمَ مِنْ ذَبِيحَةِ أَهْلِ الْكِتَابِ وَفِي ذَلِكَ مَا دَلَّ عَلَى صِحَّةِ قَوْلِ الشَّافِعِيِّ رَحِمَهُ اللهُ