Leviticus 11:3

Whatsoever parteth the hoof That is, divides it into two parts only; or, is cloven-footed As is here expressed. These qualities are not assigned as reasons why such animals are proper for food, but merely as marks whereby to distinguish them. In some animals the hoofs are solid, and not divided at all, as horses, asses, and mules; in others they are divided into several parts like toes, as in lions, wolves, dogs, (of which see Leviticus 11:27;) in a third sort, they are cloven or divided into two parts, as oxen, deer, sheep, goats. These last are of two kinds; for in some the hoof is divided, but not cloven quite through, as the camel; in others it is both parted and cloven, which are those allowed by this law to be clean creatures. And cheweth the cud Some creatures, such as oxen, sheep, and goats, for want of the upper fore-teeth, cannot chew their food perfectly at once; nor can the stomach make a perfect digestion till it be ground a second time. Therefore such animals are provided with a double stomach; an upper, into which the food goes down after the first chewing; and another, into which it is sent after the second. Such creatures as chew the cud are reckoned more wholesome, because they grind and digest what they eat better, and consequently yield a lighter and more nutritious food than others. Under the prohibition of eating beasts which do not answer this description, all beasts of prey, and those which eat flesh, are included, whose juices, Dr. James observes, are highly alkalescent, and injurious to health. All animals of the horse and ass kind are here also prohibited, and it is well known that the flesh of these is difficult to be digested, and that the juices are rank and unwholesome.