Ashtangasamgraha 6.9

6.9

In reddish-brown soil it has an alkaline-mixed quality; in mixed soil, if the water-quality is predominant, / it is sweet, but salty-sour if the earth-quality is predominant.

By these [channels] this body is lubricated, just as a garden is by water-bearing trenches or a field by canals.

And by these the navel is surrounded, like the hub of a wheel by its spokes.

In that navel especially the vital breaths are established, / and because it is the seat of the internal fire.

When addicted, he does not understand; how could a wise man indulge in that?

Therefore, for the cleansing of his passages, upper and lower purification is beneficial.

Then he should act, treating him with dry sudations and digestives.