Trung Bộ Kinh (Majjhima Nikaya) 3:105
SUJATOTasmātiha, bhikkhave, dhammesu dhammānupassī tasmiṁ samaye bhikkhu viharati ātāpī sampajāno satimā vineyya loke abhijjhādomanassaṁ.
That’s why at that time a mendicant is meditating by observing an aspect of principles—keen, aware, and mindful, rid of covetousness and displeasure for the world.