مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2867
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
Maymoon bin Mihran narrated that: He heard Ibn 'Abbas (رضي الله عنه) say: The Messenger of Allah (ﷺ) was treated with cupping when he was in ihram.
Musnad Ahmad 2888lts isnad is saheeh]