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)
أَنَّهُ قَالَ قُرِئَ عَلَيْنَا كِتَابُ رَسُولِ اللهِ ﷺ فِي أَرْضِ جُهَيْنَةَ وَأَنَا غُلَامٌ شَابٌّ أَنْ لَا تَسْتَمْتِعُوا مِنَ الْمَيْتَةِ بِإِهَابٍ وَلَا عَصَبٍ