مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3394
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn ‘Abbas (رضي الله عنه) said: as-Sa'b bin jaththamah gave the Messenger of Allah (ﷺ) an onager (that he had hunted) when he was in ihram and he returned it and said: "Were it not that we are in ihram, we would have accepted it from you."
Musnad Ahmad 3417Its isnad is saheeh, Muslim (1194]