مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2523
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn Abbas (رضي الله عنه) said: Sa’b bin Jaththamah gave the Messenger of Allah (ﷺ) the leg of an onager when he was in ihram, and he refused it, and it was dripping with blood.
Musnad Ahmad 2535Its isnad is saheeh, Muslim (1194)]