kāmamithyācārādyupadeśāder vedadharmasya nāstikādivacaneṣvapi darśanāt / kāmamithyākriyā kāmamithyācāraḥ / mātrādyabhigamanam iti yāvat /
Because Vedic characteristics such as the prescriptions of wrongful sexual acts and such are seen even in the words of nāstikas [non-believers]. 'Wrongful sexual acts' means improper conduct regarding desires, that is to say, approaching one's mother and others.