1. As a test of obedience, and to teach the Israelites habits of self-denial, and the government of their appetites.

2. To keep them distinct from other nations, and consequently from their idolatrous usages, by throwing hindrances in the way of their social intercourse; for these distinctions were applicable both to persons and things. The Canaanites not only ate the animals prohibited by Moses, which we usually eat, but others also, among which dogs were one. Besides, many of those declared unclean were sacred among the heathen, and sacrificed to their gods.

3. Because those prohibited were innutritive and unwholesome; as the swine, the flesh of which being strong and difficult to digest, affords a very gross aliment, and produces, especially in hot climates, cutaneous, scrophulous, and scorbutic disorders, as the itch, leprosy, etc.

Levítico 7:37
Esta es la ley del holocausto, de la ofrenda de cereal, de la ofrenda por el pecado, de la ofrenda por la culpa, de la ofrenda de consagración y del sacrificio de las ofrendas de paz,

Levítico 14:54
Esta es la ley acerca de toda infección de lepra, o de tiña;

Levítico 15:32
Esta es la ley para el que tiene flujo y para el hombre que tiene una emisión de semen, contaminándose por él,

Ezequiel 43:12
Esta es la ley del templo: todo su territorio sobre la cumbre del monte por todo alrededor será santísimo. He aquí, ésta es la ley del templo.