3-34 Muhammad ibn al-Hassan ibn Ahmad ibn al-Walid - may God be pleased with him - narrated that Muhammad ibn al-Hassan al-Saffar quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Ali ibn al-Hikam who linked it up through a chain of narrators to Aba Abdullah as-Sadiq (MGB),

“The following are three of the traditions of the Messengers (MGB): putting on perfume, having their hair cut, and making love often.”