Exodus 10:27 KJV
But the Lord hardened Pharaoh’s heart, and he would not let them go.
Exodus 10:27, King James Version
In context
26 Our cattle also shall go with us; there shall not an hoof be left behind; for thereof must we take to serve the Lord our God; and we know not with what we must serve the Lord, until we come thither.
27 But the Lord hardened Pharaoh’s heart, and he would not let them go.
28 And Pharaoh said unto him, Get thee from me, take heed to thyself, see my face no more; for in that day thou seest my face thou shalt die.