Exodus 10:2-4 King James Version (KJV)
2 And that thou mayest tell in the ears of thy son, and of thy son's son, what things I have wrought in Egypt, and my signs which I have done among them; that ye may know how that I am the Lord.
3 And Moses and Aaron came in unto Pharaoh, and said unto him, Thus saith the Lord God of the Hebrews, How long wilt thou refuse to humble thyself before me? let my people go, that they may serve me.
4 Else, if thou refuse to let my people go, behold, to morrow will I bring the locusts into thy coast: