Sunan Ibn Majah, Book 31, Hadith 3607 (In-Book) ⓘ
It was narrated that Ibn ‘Abbas said: “The Messenger of Allah said: ‘What a good slave is the cupper. He takes away the blood, reduces pressure on the spine, and improves the eyesight.’”
حَدَّثَنَا أَبُو بِشْرٍ، بَكْرُ بْنُ خَلَفٍ حَدَّثَنَا عَبْدُ الأَعْلَى، حَدَّثَنَا عَبَّادُ بْنُ مَنْصُورٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " نِعْمَ الْعَبْدُ الْحَجَّامُ يَذْهَبُ بِالدَّمِ وَيُخِفُّ الصُّلْبَ وَيَجْلُو الْبَصَرَ " .
also referenced under: Hadith 3478 (Reference) & Volume 4, Book 31, Hadith 3478 (DarusSalam)