7-66 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted on the authority of Yaqoob ibn Yazid and Muhammad ibn al-Hussein ibn Abil-Khat’tab, on the authority of Hammad ibn Isa, on the authority of someone who had narrated that Aba Abdullah as-Sadiq (MGB) said, “It was the Prophet (MGB)’s custom was to have blood-letting done for him on Monday afternoons. He (MGB) used to say, ‘Having phlebotomy done on Monday afternoons would immediately relieves one’s pains.’”