Trung Bộ Kinh (Majjhima Nikaya) 4:32
SUJATOTassa amanasikaraṇīyānaṁ dhammānaṁ manasikārā manasikaraṇīyānaṁ dhammānaṁ amanasikārā anuppannā ceva āsavā uppajjanti uppannā ca āsavā pavaḍḍhanti.
Because of applying the mind to what they should not and not applying the mind to what they should, unarisen defilements arise and arisen defilements grow.