In Private (2nd)Dutiyarahogatasutta

At Sāvatthī.Sāvatthinidānaṁ.

Then as Anuruddha was in private retreat this thought came to his mind:Atha kho āyasmato anuruddhassa rahogatassa paṭisallīnassa evaṁ cetaso parivitakko udapādi:

“Whoever has missed out on these four kinds of mindfulness meditation has missed out on the noble path to the complete ending of suffering.“yesaṁ kesañci cattāro satipaṭṭhānā viraddhā, viraddho tesaṁ ariyo maggo sammā dukkhakkhayagāmī; Whoever has undertaken these four kinds of mindfulness meditation has undertaken the noble path to the complete ending of suffering.”yesaṁ kesañci cattāro satipaṭṭhānā āraddhā, āraddho tesaṁ ariyo maggo sammā dukkhakkhayagāmī”ti.

Then Venerable Mahāmoggallāna knew what Venerable Anuruddha was thinking. As easily as a strong person would extend or contract their arm, he reappeared in front of Anuruddha and said to him:Atha kho āyasmā mahāmoggallāno āyasmato anuruddhassa cetasā cetoparivitakkamaññāya—seyyathāpi nāma balavā puriso samiñjitaṁ vā bāhaṁ pasāreyya, pasāritaṁ vā bāhaṁ samiñjeyya; evameva—āyasmato anuruddhassa sammukhe pāturahosi. Atha kho āyasmā mahāmoggallāno āyasmantaṁ anuruddhaṁ etadavoca:

“Reverend Anuruddha, how do you define the undertaking of the four kinds of mindfulness meditation by a mendicant?”“kittāvatā nu kho, āvuso anuruddha, bhikkhuno cattāro satipaṭṭhānā āraddhā hontī”ti?

“Reverend, it’s when a mendicant meditates by observing an aspect of the body internally—keen, aware, and mindful, rid of covetousness and displeasure for the world.“Idhāvuso, bhikkhu ajjhattaṁ kāye kāyānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. They meditate observing an aspect of the body externally …Bahiddhā kāye kāyānupassī viharati …pe… internally and externally—keen, aware, and mindful, rid of covetousness and displeasure for the world.ajjhattabahiddhā kāye kāyānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ.

They meditate observing an aspect of feelings internally …Ajjhattaṁ vedanāsu vedanānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. externally …Bahiddhā vedanāsu vedanānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. internally and externally …Ajjhattabahiddhā vedanāsu vedanānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ.

They meditate observing an aspect of the mind internally …Ajjhattaṁ citte …pe… externally …bahiddhā citte …pe… internally and externally …ajjhattabahiddhā citte cittānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ.

They meditate observing an aspect of principles internally …Ajjhattaṁ dhammesu …pe… externally …bahiddhā dhammesu …pe… internally and externally—keen, aware, and mindful, rid of covetousness and displeasure for the world.ajjhattabahiddhā dhammesu dhammānupassī viharati ātāpī sampajāno satimā, vineyya loke abhijjhādomanassaṁ. That’s how to define the undertaking of the four kinds of mindfulness meditation by a mendicant.”Ettāvatā kho, āvuso, bhikkhuno cattāro satipaṭṭhānā āraddhā hontī”ti.