Paṭhamamaraṇassatisutta
Ekaṁ samayaṁ bhagavā nātike viharati giñjakāvasathe. Tatra kho bhagavā bhikkhū āmantesi: “bhikkhavo”ti. “Bhadante”ti te bhikkhū bhagavato paccassosuṁ. Bhagavā etadavoca: “maraṇassati, bhikkhave, bhāvitā bahulīkatā mahapphalā hoti mahānisaṁsā amatogadhā amatapariyosānā. Bhāvetha no tumhe, bhikkhave, maraṇassatin”ti?
Mindfulness of Death (1st)
At one time the Buddha was staying at Ñātika in the brick house. There the Buddha addressed the mendicants, “Mendicants!” “Venerable sir,” they replied. The Buddha said this: “Mendicants, when mindfulness of death is developed and cultivated it’s very fruitful and beneficial. It has freedom from death as its objective and culmination. But do you develop mindfulness of death?”