Jeremiah 46:20

Egypt is like a very fair heifer. — The similitude points, like the “strong one” of Jeremiah 46:15, to the Apis worship of Egypt. The nation is like its god. The figure is continued in the words that follow. There comes from the north (from the land of the Chaldees, as in Jeremiah 1:1), not “destruction,” but a gadfly that shall sting the heifer into the madness of agony. So, in Isaiah 7:18, the “fly” of Egypt and the “bee” of Assyria are invited to work evil on Judah. The words find a striking parallel in the Greek legend of Io (probably to be identified with the Egyptian Isis) transformed into a heifer, and her gadfly tormentor, this also connected with the Apis or Mnevis deities of Egypt (Æschyl. Prom. v. 569). The word for “destruction” is not found elsewhere, but the etymology suggests the idea of “pinching” or “stinging,” and the meaning “gadfly” is accepted by many recent scholars.