Narrated Abu Kabsha al-Anmari told that God’s messenger used to have himself cupped on the top of his head and between his shoulders and that he used to say:
“If anyone pours out any of this blood he will not suffer if he applies no medical treatment for anything.”
In telling about the night when he was taken up to heaven God’s messenger said that he did not pass a company of angels without their ordering him to command his people to have themselves cupped.
Tirmidhi and Ibn Majah transmitted it, Tirmidhi saying that this is a hasan gharlb tradition.
