“There came to us a letter from the Prophet ﷺ (saying): ‘No not make use of the untanned skin and sinew of dead animals.’” (Using translation from Ibn Mājah 3613)
أَتَانَا كِتَابُ النَّبِيِّ ﷺوَنَحْنُ بِأَرْضِ جُهَيْنَةَ وَأَنَا غُلَامٌ شَابٌّ أَنْ لَا تَنْتَفِعُوا مِنَ الْمَيْتَةِ بِإِهَابٍ وَلَا عَصَبٍ