Mark 5:13

And forthwith Jesus gave them leave. And the unclean spirits went out and entered into the swine; and the herd ran violently down a steep place into the sea, (they were about two thousand;) and were choked in the sea.

Not in the immediate vicinity of the speaker, but at some distance, yet in plain sight, on the slope of the hills near the sea, there was a large herd of swine grazing. To the Jews, swine were unclean animals, and they were not allowed to eat them. But here on the border the inhabitants were influenced but little by Jewish customs and laws. The evil spirits knew that Jesus would not give them permission to enter into any man, and therefore they wanted to vent their spite and helpless anger on dumb animals. They changed their plea to this effect, that they might take possession of the swine. The devil is a murderer from the beginning. If he cannot destroy the soul of man, he takes possession of the body; and when this is forbidden him, he tortures brute beasts. His one desire is to destroy the life which God has created. Jesus here permitted, gave leave to, the spirits to do as they had asked; it was better that animals should perish than that man, made in the image of God, should be tormented. The result: With a mighty uproar the swine, numbering about two thousand, cast themselves down the precipice overhanging the sea, and were drowned in the water. The devil, in his work of destruction, is not permitted to go one step farther than God gives him leave. Note: Why it is that God sometimes permits the spirits of darkness and destruction to work harm to His creation is one of the secrets which our weak reason cannot fathom. We know only so much, that the loss of money and goods are chastisements of God, by which He intends to rouse men out of their security.