Philo Judaeus De Virtutibus 18

But such great anxiety and energy is displayed by the law in attaining the object of training and exercising the soul so as to fill it with courage, that it has even descended to particulars in the matter of raiment, enjoining what men ought to wear, and prohibiting with all its might a man from wearing the garments of a woman, in order that no trace or shadow of the female may be attached to the male part of mankind, to its discredit; for the law, being at all times in perfect consistency and accordance with nature, desires to establish laws which shall be akin to and in perfect harmony with one another from beginning to end, even in those minute points which, by reason of their insignificance, appear to be beneath the notice of ordinary legislators.