Amatasutta

Sāvatthinidānaṁ. “Catūsu, bhikkhave, satipaṭṭhānesu suppatiṭṭhitacittā viharatha. Mā vo amataṁ panassa. Katamesu catūsu? Idha, bhikkhave, bhikkhu kāye kāyānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ; vedanāsu …pe… citte …pe… dhammesu dhammānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. Imesu, bhikkhave, catūsu satipaṭṭhānesu suppatiṭṭhitacittā viharatha. Mā vo amataṁ panassā”ti. Paṭhamaṁ.

At Sāvatthī. “Mendicants, you should meditate with your mind firmly established in the four kinds of mindfulness meditation. Don’t let freedom from death be lost on you. 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. You should meditate with your mind firmly established in the four kinds of mindfulness meditation. Don’t let freedom from death be lost on you.”