佛說觀佛三昧海經 2.16

2.16

The prince remained serene, his body and mind unmoved. Directing his white curl toward them, he caused the three heavenly maidens to see within their own bodies the sacks of pus, snot, and saliva, the nine apertures, tendons, and veins—all the root constituents—the large intestines, small intestines, undigested-food receptacle, and digested-food receptacle. In between these, twisting, writhing, and surging forth were all kinds of worms, their count reaching eighty thousand families, with each family containing nine hundred million tiny worms. When the worms played, they scurried into the small intestine, all having four mouths opened upward; when the large worms played, they entered the large intestine, emerged from the large intestine, and re-entered the stomach. When cold ailments arose, the stomach duct became blocked and the worms could not enter, so food would not digest. Between the spleen, kidneys, liver, lungs, heart, gall bladder, throat, lung-fat, and diaphragm, another four worms were born, like four coiling snakes, feeding together upward and downward on all the internal organs until the dregs were exhausted and fluids flowed out, becoming tears when entering the eyes, mucus when entering the nose, saliva when gathering in the mouth, and drool when issuing from the mouth. In the thin skin, thick skin, tendons, marrow, and all the vessels, worms were born, finer than autumn hairs, exceedingly numerous beyond description.