SN 47.27

Samattasutta

Taṁyeva nidānaṁ. Ekamantaṁ nisinno kho āyasmā sāriputto āyasmantaṁ anuruddhaṁ etadavoca: “‘asekho, asekho’ti, āvuso anuruddha, vuccati. Kittāvatā nu kho, āvuso, asekho hotī”ti? “Catunnaṁ kho, āvuso, satipaṭṭhānānaṁ samattaṁ bhāvitattā asekho hoti.

Completely

The same setting. “Reverend, they speak of the one called ‘an adept’. How is an adept defined?” “Reverends, an adept is someone who has completely developed the four kinds of mindfulness meditation.

Katamesaṁ catunnaṁ? Idhāvuso, bhikkhu kāye kāyānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ; vedanāsu …pe… citte …pe… dhammesu dhammānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. Imesaṁ kho, āvuso, catunnaṁ satipaṭṭhānānaṁ samattaṁ bhāvitattā asekho hotī”ti.

What four? It’s when a mendicant meditates by observing an aspect of the body—keen, aware, and mindful, rid of covetousness and displeasure for the world. They meditate observing an aspect of feelings … mind … principles—keen, aware, and mindful, rid of covetousness and displeasure for the world. An adept is someone who has completely developed the four kinds of mindfulness meditation.”