Leafy greens, milk products, whole grains, and some other foods tend to leave undigested parts (residue) in the colon. A low-residue diet limits these, options that are especially high in fiber, in order to reduce stool. This allows the digestive system (the large intestine, in particular) to rest, as bowel movements will become smaller and less frequent.
Original article: https://www.verywellhealth.com/low-residue-diet-tips-797574
