Muhammad ibn Yaqub, from Muhammad ibn Yahya, from Ahmad ibn Yahya, from Ali ibn al-Hakam, from al-Husayn ibn Abi al-Ala, who said: I (narrator) asked Abu Abdillah عليه السلام, peace be upon him, about ‘cupping (al-hijamah) for the fasting person.’ Imam عليه السلام said: “Yes, if he does not fear weakness.” – meaning which makes him unable to keep the fast.