4-112 Muhammad ibn al-Hassan ibn Ahmad ibn al-Walid - may God be pleased with him - narrated that Muhammad ibn al-Hassan al-Saffar quoted Yaqoob ibn Yazid, on the authority of Ibn Abi Umayr, on the authority of Hafs ibn al-Bakhtari, on the authority of Aba Abdullah as-Sadiq (MGB),

“There are four types of medical treatment. They are cupping, inhaling snuff, inserting a suppository , and making an injection.”