Exodus 9:6

6. all the cattle of Egypt died—not absolutely every beast, for we find (Exodus 9:19; Exodus 9:21) that there were still some left; but a great many died of each herd—the mortality was frequent and widespread. The adaptation of this judgment consisted in Egyptians venerating the more useful animals such as the ox, the cow, and the ram; in all parts of the country temples were reared and divine honors paid to these domesticated beasts, and thus while the pestilence caused a great loss in money, it also struck a heavy blow at their superstition.