[115] Therein, what is the earth element (paṭhavī-dhātu)?
The earth element is twofold: there is the internal, there is the external.
Therein, what is the internal earth element?
That which is internal, belonging to oneself, hard, harsh, hardness, the state of being hard, internal, clung-to (upādinna) — namely: head hairs, body hairs, nails, teeth, skin, flesh, sinews, bones, bone marrow, kidneys, heart, liver, pleura, spleen, lungs, intestines, mesentery, contents of the stomach, feces — or whatever else there is that is internal, belonging to oneself, hard, harsh, hardness, the state of being hard, internal, clung-to: this is called the internal earth element.
Therein, what is the external earth element?
That which is external, hard, harsh, hardness, the state of being hard, outside, not clung-to (anupādinna) — namely: iron, copper, tin, lead, silver, pearl, gem, beryl, conch shell, stone, coral, silver coin, gold, ruby, cat's-eye gem, grass, wood, gravel, potsherd, earth, rock, mountain — or whatever else there is that is external, hard, harsh, hardness, the state of being hard, outside, not clung-to: this is called the external earth element.
The internal earth element and the external earth element — having gathered them together and combined them into one, this is called the earth element.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.