مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2360
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
Ibn Shihab narrated that ‘Ubaidullah bin 'Abdullah told him that Ibn 'Abbas told him: The Messenger of Allah (ﷺ) passed by a dead sheep and said: “Why don't you try to make use of its skin?" They said: O Messenger of Allah, it is dead [i.e., it died of natural causes and was not slaughtered properly]. He said: “It is only forbidden to eat it."
Musnad Ahmad 2369Its isnad is saheeh, al-Bukhari (1492) and Muslim (363)]