Sunan an-Nasa'i 4249
سنن النسائي#4249SahihIt was narrated that 'Abdullah bin 'Ukaim said:"The letter of the Messenger of Allah was read to us when I was a young boy: 'Do not make use of the skins and sinew of dead animals
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 41:28