[683] And how, bhikkhus, is a bhikkhu mindful? Here, bhikkhus, a bhikkhu dwells contemplating the body in the body (kāyānupassanā), ardent (ātāpī), clearly comprehending (sampajāno), possessed of mindfulness (sati), having removed covetousness and grief regarding the world. He dwells contemplating feelings in feelings (vedanā) … in the mind (citta) … He dwells contemplating dhammas in dhammas, ardent, clearly comprehending, possessed of mindfulness, having removed covetousness and grief regarding the world. It is in this way, bhikkhus, that a bhikkhu is mindful.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.