Narrated Al-Bara and 'Abdullah bin Abl Aufa:

That when they were in the company of the Prophet, they got some donkeys which they (slaughtered and) cooked. Then the announcer of the Prophet ﷺ said, "Turn the cooking pots upside down (i.e. throw out the meat)."

حَدَّثَنَا حَجَّاجُ بْنُ مِنْهَالٍ، حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي عَدِيُّ بْنُ ثَابِتٍ، عَنِ الْبَرَاءِ، وَعَبْدِ اللَّهِ بْنِ أَبِي أَوْفَى، رضى الله عنهم أَنَّهُمْ كَانُوا مَعَ النَّبِيِّ ﷺ فَأَصَابُوا حُمُرًا فَطَبَخُوهَا، فَنَادَى مُنَادِي النَّبِيِّ ﷺ أَكْفِئُوا الْقُدُورَ.