Exodus 11:8-10 (King James Version) 8 And all these thy servants shall come down unto me.

Exodus 11:8-10 (King James Version)
8 And all these thy servants shall come down unto me, and bow down themselves unto me, saying, Get thee out, and all the people that follow thee: and after that I will go out. And he went out from Pharaoh in a great anger.
9 And the Lord said unto Moses, Pharaoh shall not hearken unto you; that my wonders may be multiplied in the land of Egypt.
10 And Moses and Aaron did all these wonders before Pharaoh: and the Lord hardened
Pharaoh's heart, so that he would not let the children of Israel go out of his land.