Silsilat al-Ahadith al-Sahihah

Sayyiduna Anas (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings of Allah be upon him) used to have cupping done on the two hidden veins on both sides of the neck and the upper part of the back, and he used to have cupping done on the seventeenth, nineteenth, and twenty-first dates (of the lunar month).