Exodus 10:1-2

Young's Literal Translation

10 And Jehovah saith unto Moses, `Go in unto Pharaoh, for I have declared hard his heart, and the heart of his servants, so that I set these My signs in their midst,

² and so that thou recountest in the ears of thy son, and of thy son's son, that which I have done in Egypt, and My signs which I have set among them, and ye have known that I [am] Jehovah.'