Sunan Ibn Majah Book 25, Hadith 3106

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، وَعَمْرُو بْنُ عَبْدِ اللَّهِ، قَالُوا حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ نَاجِيَةَ الْخُزَاعِيِّ، - قَالَ عَمْرٌو فِي حَدِيثِهِ وَكَانَ صَاحِبَ بُدْنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ - قَالَ قُلْتُ يَا رَسُولَ اللَّهِ كَيْفَ أَصْنَعُ بِمَا عَطِبَ مِنَ الْبُدْنِ قَالَ ‏ "‏ انْحَرْهُ وَاغْمِسْ نَعْلَهُ فِي دَمِهِ ثُمَّ اضْرِبْ صَفْحَتَهُ وَخَلِّ بَيْنَهُ وَبَيْنَ النَّاسِ فَلْيَأْكُلُوهُ ‏"‏ ‏.‏

It was narrated that Najiyah Al-Khuza’i – in his narration, ‘Amr (one of the narrators) said that he was the one who looked after the sacrificial animals of the Prophet (ﷺ) – said:“I said: ‘O Messenger of Allah, what should I do with those sacrificial animals that become unfit?’ He said: ‘Slaughter them, dip its sandal in its blood, then place it on its side, and leave them for the people to eat.’”