Dutiyakaṇḍakīsutta

Sāketanidānaṁ. Ekamantaṁ nisinno kho āyasmā sāriputto āyasmantaṁ anuruddhaṁ etadavoca: “asekhenāvuso anuruddha, bhikkhunā katame dhammā upasampajja vihātabbā”ti? “Asekhenāvuso sāriputta, bhikkhunā cattāro satipaṭṭhānā upasampajja vihātabbā. Katame cattāro? Idhāvuso, bhikkhu kāye kāyānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ; vedanāsu …pe… citte …pe… dhammesu dhammānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ— asekhenāvuso sāriputta, bhikkhunā ime cattāro satipaṭṭhānā upasampajja vihātabbā”ti. Pañcamaṁ.

At Sāketa. Sāriputta said to Anuruddha: “Reverend Anuruddha, what things should a mendicant who is an adept enter and remain in?” “Reverend Sāriputta, a mendicant who is an adept should enter and remain in the four kinds of mindfulness meditation. 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. A mendicant who is an adept should enter and remain in these four kinds of mindfulness meditation.”