Albert Barnes Commentary Exodus 22:31

"And ye shall be holy men unto me: therefore ye shall not eat any flesh that is torn of beasts in the field; ye shall cast it to the dogs." — Exodus 22:31 (ASV)

The sanctification of the nation was emphatically symbolized by strictness of diet regarding both the kind of animal, and the mode of slaughtering. See Leviticus 11:0;Leviticus 17:0.