Garudapurana 1.105.37

1.105.37

vṛkṣagulmalatāvīrucchedane japyamṛkśatam /
avakīrṇo bhavedgattvā brahmacārī ca yoṣitam //

For cutting down trees, shrubs, climbing plants, or creepers, a hundred Ṛgvedic verses are to be muttered. / A celibate student who approaches a woman becomes an avakīrṇin;