It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The best days on which you can get cupping done are the seventeenth, nineteenth, and twenty-first dates," and he said that "On the night of Mi'raj, whichever group of angels I passed by, they all said to me: O Muhammad (peace and blessings be upon him)! Make cupping obligatory upon yourself."