Washing the Head

4. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Musa ibn Sa‘dan from ‘Abd Allah ibn Sinan who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘One who trims his fingernails and washes his head with marshmallow plant every Friday is like one who sets free one human soul from bondage and slavery.’”