[1255] "Here, friend, a bhikkhu dwells contemplating the nature of origin (samudayadhamma) in the body internally … dwells contemplating the nature of vanishing (vayadhamma) in the body internally. He dwells contemplating the nature of origin and vanishing in the body internally, ardent (ātāpī), clearly comprehending (sampajāno), mindful, having removed covetousness and grief regarding the world (abhijjhā-domanassa). He dwells contemplating the nature of origin in the body externally … dwells contemplating the nature of vanishing in the body externally. He dwells contemplating the nature of origin and vanishing in the body externally, ardent, clearly comprehending, mindful, having removed covetousness and grief regarding the world. He dwells contemplating the nature of origin in the body internally and externally. He dwells contemplating the nature of vanishing in the body internally and externally. He dwells contemplating the nature of origin and vanishing in the body internally and externally, ardent, clearly comprehending, mindful, having removed covetousness and grief regarding the world."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.