Muslim bin Ibrahim al-Azdy مسلم بن إبراهيم الأزدي الفراهيدي · Medicine (Kitab Al-Tibb)

The Messenger of Allah (ﷺ) 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 his blood, he will not suffer if he applies no medical treatment for anything.

(the narrator other than Musa said that Kayyisah daughter of AbuBakrah) She said that her father used to forbid his family to have themselves cupped on a Tuesday, and used to assert on the authority of the Messenger of Allah (ﷺ) that Tuesday is the day of blood in which there is an hour when it does not stop.

If anyone drinks poison, the poison will be in his hand (on the Day of Judgement) and he will drink it in Hell-fire and he will live in it eternally.