Digha Nikaya (Coleção dos Discursos Longos) 2:45
SUJATOPuna caparaṁ, bhikkhave, bhikkhu imameva kāyaṁ yathāṭhitaṁ yathāpaṇihitaṁ dhātuso paccavekkhati:
Furthermore, a mendicant examines their own body, whatever its placement or posture, according to the elements: