7-88 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad, on the authority of Muhammad ibn Hisan al-Razi, on the authority of Abi Muhammad al-Razi, on the authority of Al-Hussein ibn Yazid, on the authority of Al-Sakoony, on the authority of Aba Abdullah as-Sadiq (MGB), on the authority of his father (MGB) that God’s Prophet (MGB) said,

“God would take away pain from the hands of whoever cuts his nails on Fridays and would heal them.” It has also been narrated that he would be immune from insanity, leprosy and vitiligo .