مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2883
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn ‘Abbas (رضي الله عنه) that: The Prophet (ﷺ) was treated with cupping in the veins at the sides of the neck and between his shoulders, and he gave the cupper his fee. If it were haram, he would not have given him his fee.
Musnad Ahmad 2904A saheeh hadeeth; this is a da’eef isnad]