[1280] "And how, friends, does a bhikkhu develop the four establishments of mindfulness (satipaṭṭhāna), how does he cultivate the four establishments of mindfulness? Here, friends, a bhikkhu dwells contemplating the body in the body (kāyānupassanā) ... he dwells contemplating feelings in feelings (vedanā) ... he dwells contemplating mind in mind (citta) ... he dwells contemplating dhammas in dhammas — ardent, clearly comprehending, mindful, having removed covetousness and grief regarding the world. It is in this way, friends, that a bhikkhu develops the four establishments of mindfulness and cultivates the four establishments of mindfulness."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.