Sunan Abi Dawud Book 29, Hadith 3
The Prophet (ﷺ) said: The best medical treatment you apply is cupping.
The Messenger of Allah (ﷺ) came to visit me, accompanied by Ali who was convalescing. We had some ripe dates hung up. The Messenger of Allah (ﷺ) got up and began to eat from them.
Ali also got up to eat, but the Messenger of Allah (ﷺ) said repeatedly to Ali: Stop, Ali, for you are convalescing, and Ali stopped.
She said: I then prepared some barley and beer-root and brought it. The Messenger of Allah (ﷺ) then said: Take some of this, Ali, for it will be more beneficial for you. AbuDawud said: The narrator Harun said: al-Adawiyyah (i.e. Umm al-Mundhar).
the maid-servant of the Messenger of Allah (ﷺ), said: No one complained to the Messenger of Allah (ﷺ) of a headache but he told him to get himself cupped, or of a pain in his legs but he told him to dye them with henna.