Trường Bộ Kinh (Digha Nikaya) 2:12
SUJATOdhammesu dhammānupassī viharati ātāpī sampajāno satimā vineyya loke abhijjhādomanassaṁ.
They meditate observing an aspect of principles—keen, aware, and mindful, rid of covetousness and displeasure for the world.