7-87 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted Muhammad ibn al-Hussein ibn Abil Khattab, on the authority of Salih ibn Aqabah, on the authority of Abi Kahmas,

“I asked Aba Abdullah as-Sadiq (MGB), ‘Please teach me some supplications which would expedite the provision of one’s sustenance.’ The Imam (MGB) told me, ‘Shave your moustache and cut your nails. Do this on Fridays.’”