مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3263
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas and from Hisham bin 'Urwah from his father, that The Messenger of Allah (ﷺ) was treated with cupping and he gave the cupper his fee.
Musnad Ahmad 3286The text of the report is saheeh]