"The Messenger of Allah (S.A.W) narrated about the Night of Isra', saying that he did not pass an assembly of angels except that they ordered him: 'Order cupping among your Ummah."
Jami` at-Tirmidhi Book 28, Hadith 17
← Previous Hadith "The Prophet (S.A.W) would get cupped in his jugular veins and his upper back. And he would get cupped on the seventeenth (of the month), (or) the nineteenth, and (or) the twenty first."

Jami` at-Tirmidhi Book 28, Hadith 16 Next Hadith → "Ibn 'Abbas had three boys who were cuppers. He would use the proceeds from two of them for himself and his family, and one of them would cup him and his family." He said: " Ibn 'Abbas said: 'The Prophet (S.A.W) said: 'How excellent is the slave who cups, letting the blood, relieving the back, and clearing the vision." And he said: "Indeed the best for you to cup on are the seventeenth, the nineteenth, and the twenty-first." And he said: "Indeed the best of what you treat is As-Sa'ut, Al-Ladud, cupping and laxatives." And indeed, The Messenger of Allah (S.A.W) was given medicine by Al-Abbas and his companions. So the The Messenger of Allah (S.A.W) said: "Who gave me this medicine?" All of them were silent, so he said that there shall not remain anyone in the house but he should be treated with Ladud except for his uncle Al-Abbas.'" An-Nadr said: "Al-Ladud is Al-Wajur."

Jami` at-Tirmidhi Book 28, Hadith 18