مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1894
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn "Abbas said: I heard the Prophet (ﷺ) say: "Any animal skin that is tanned is pure.”
Musnad Ahmad 1895Sahih (Darussalam) [ Muslim (366)]