The letter of the Messenger of Allah ﷺ was read out to us in the territory of Juhaynah when I was a young boy: Do not make use of the skin or sinew of an animal which died a natural death. (Using translation from Abū Dāʾūd 4127)
قُرِئَ عَلَيْنَا كِتَابُ رَسُولِ اللهِ ﷺ مِنْ أَرْضِ جُهَيْنَةَ وَأَنَا غُلَامٌ شَابٌّ «أَنْ لَا تَنْتَفِعُوا مِنَ الْمَيْتَةِ بِشَيْءٍ بِإِهَابٍ وَلَا عَصْبٍ»