Yadi hy aham na varteyam jatu karmany atandritah
mama vartmanuvartante manusyah partha sarvasah
(Text 23, Ch 3, Karma Yoga)
Meaning: For if I ever failed to engage in carefully performing prescribed duties, O Partha, certainly all men would follow My path.
*** In order to keep the balance of social tranquillity for progress in spiritual life, there are traditional family usage meant for every civilized man. Although such rules and regulations are for the conditioned souls and not Lord krishna(divine soul), because he descended to establish the principal of religion He followed the prescribed rules.