Exodus 9:12-14

American Standard Version

¹² And Jehovah ^[a]hardened the heart of Pharaoh, and he hearkened not unto them; as Jehovah had spoken unto Moses. ¹³ And Jehovah said unto Moses, Rise up early in the morning, and stand before Pharaoh, and say unto him, Thus saith Jehovah, the God of the Hebrews, Let my people go, that they may serve me. ¹⁴ For I will this time send all my plagues upon thy heart, and upon thy servants, and upon thy people; that thou mayest know that there is none like me in all the earth.