[116] Therein, which is the water element (āpodhātu)?
The water element is twofold: there is the internal, there is the external.
Therein, which is the internal water element?
That which internally, belonging to oneself, is water (āpo), what is watery, viscidity (sneha), what is viscid, the binding together of form — internal, clung-to (upādinna) — namely: bile, phlegm, pus, blood, sweat, fat, tears, grease, saliva, snot, synovial fluid, urine; or whatever else there is that internally, belonging to oneself, is water, what is watery, viscidity, what is viscid, the binding together of form — internal, clung-to: this is called the internal water element.
Therein, which is the external water element?
That which externally is water, what is watery, viscidity, what is viscid, the binding together of form — external, not clung-to (anupādinna) — namely: the sap of roots, the sap of stems, the sap of bark, the sap of leaves, the sap of flowers, the juice of fruits, milk, curds, ghee, butter, oil, honey, molasses, waters in the earth or waters in the atmosphere; or whatever else there is that externally is water, what is watery, viscidity, what is viscid, the binding together of form — external, not clung-to: this is called the external water element.
The internal water element and the external water element — having gathered these together and combined them as one, this is called the water element.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.