Leviticus 11:7

And the swine This animal is remarkable for filthiness, and for feeding on all manner of ordure, even carrion if it falls in its way, and therefore a sow wallowing in the mire is set forth as an emblem of impurity, by writers sacred and profane. And Maimonides alleges its filthiness as the chief reason of its flesh being prohibited. Vossius, however, adds another, namely, that it had a tendency to breed the leprosy, a disease incident to those countries. And, according to the author of the Medicinal Dictionary, it is the only animal in the creation subject to the leprosy, and to something very like the king's evil, called in Latin scrofula, from scrofa, a sow. The flesh, therefore, of this animal could not but be highly improper, as an aliment, for a people subject to leprosies, as the Jews appear to have been, and who were inhabitants of a warm climate, which renders every thing more inclinable to putrefaction.