The Great Epic of the Bhārata dynasty 12.207.9

12.207.9

jihvayā rasanaṃ yacca tadeva parivarjitam |
buddhyā ca vyavasāyena brahmacaryamakalmaṣam || 9 ||

It is on that account free from all the perceptions that the senses give. It is heard only as a word, and its form, without being seen, can only be conceived. It is a state of existence depending only on the mind. It is free from all connection with the senses. That sinless state should be attained to by the understanding alone. He that practises it duly attains to Brahma; he that practises it half and half, attains to the condition of the gods; while he that practises it indifferently, takes birth among Brahmanas and possessed of learning attains to eminence. Brahmacharya is exceedingly difficult to practise. Listen now to the means (by which one may practise it). That regenerate person who betakes himself to it should subdue the quality of Passion as soon as it begins to manifest itself or as soon as it begins to be powerful. One that has betaken oneself to that vow should not speak with women. He should never cast his eyes on an undressed woman. The sight of women, under even indifferent circumstances, fills all weak-minded men with Passion. If a person (while observing this vow) feels a desire for woman rising in his heart, he should (as an expiation) observe the vow called Krichcchra and also pass three days in water. If desire is entertained in course of a dream, one should, diving in water, mentally repeat for three times the three Riks by Aghamarshana.