Majjhima Nikaya 4:53
SUJATOYassa, bhikkhave, dhamme manasikaroto anuppanno vā kāmāsavo uppajjati, uppanno vā kāmāsavo pavaḍḍhati;
They are the things that, when the mind is applied to them, give rise to unarisen defilements and make arisen defilements grow: the defilements of sensual desire,