22-5 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that his uncle Muhammad ibn Abil-Qasim quoted Harun ibn Muslim, on the authority of Mus’adat ibn Sadaqah, on the authority of Ja’far ibn Muhammad as-Sadiq (MGB), on the authority of his father (MGB), on the authority of his forefathers (MGB), on the authority of Ali (MGB) that God’s Prophet (MGB) said, “
Anyone who believes in God and the Hereafter should not postpone shaving the pubic hair for more than forty days. If he doesn’t have a razor after forty days, he should borrow one and not put it off.”