4-114 Muhammad ibn Musa ibn al-Mutevakil - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad, on the authority of Muhammad ibn Ali al-Hamedany, on the authority of Umar ibn Isa, on the authority of Forat ibn Ahnaf, “Abu Abdullah as-Sadiq (MGB) was questioned about leeks. The Imam (MGB) said, ‘They have four characteristics: It makes your mouth smell fresh, it lets off the air from the digestive system; it can stop hemorrhoids, and it can provide immunity from leprosy if you constantly eat it.”