Bhikkhusutta 2.2

2.2

Idha tvaṃ, bhikkhu, ajjhattaṃ vā kāye kāyānupassī viharāhi ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṃ;

Meditate observing an aspect of the body internally—keen, aware, and mindful, rid of covetousness and displeasure for the world.