John Wesley on Exodus 8:22

Know that I am the Lord in the midst of the earth - In every part of it. Swarms of flies, which seem to us to fly at random, shall be manifestly under the conduct of an intelligent mind. Hither they shall go, saith Moses, and thither they shall come, and the performance is punctual according to this appointment; and both compared amount to a demonstration, that he that said it, and he that did it, was the same, even a being of infinite power and wisdom.