“The Messenger of Allah ﷺ said: ‘What a good slave is the cupper. He takes away the blood, reduces pressure on the spine, and improves the eyesight.’”
قَالَ رَسُولُ اللَّهِ ﷺ نِعْمَ الْعَبْدُ الْحَجَّامُ يَذْهَبُ بِالدَّمِ وَيُخِفُّ الصُّلْبَ وَيَجْلُو الْبَصَرَ