[684] "And what, bhikkhu, is the earth element (paṭhavīdhātu)? The earth element may be internal, or it may be external. And what, bhikkhu, is the internal earth element? Whatever internally, belonging to oneself, is hard, solid, and clung-to (upādinna), namely: head hairs, body hairs, nails, teeth, skin, flesh, sinews, bones, bone marrow, kidneys, heart, liver, pleura, spleen, lungs, intestines, mesentery, stomach contents, feces, or whatever else internally, belonging to oneself, is hard, solid, and clung-to—this, bhikkhu, is called the internal earth element. Now both the internal earth element and the external earth element are simply the earth element. That should be seen as it really is with right wisdom thus: 'This is not mine, this I am not, this is not my self.' Having seen it thus as it really is with right wisdom, one becomes disenchanted with the earth element and makes the mind (citta) dispassionate toward the earth element."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.