Exodus 9:14 in the King James Version
For I will at this time send all my plagues upon thine heart, and upon thy servants, and upon thy people; that thou mayest know that there is none like me in all the earth.
Context
13 The LORD said to Moses, “Rise up early in the morning, and stand before Pharaoh, and tell him, ‘This is what the LORD, the God of the Hebrews, says: “Let my people go, that they may serve me.
14 For this time I will send all my plagues against your heart, against your officials, and against your people; that you may know that there is no one like me in all the earth.
15 For now I would have stretched out my hand, and struck you and your people with pestilence, and you would have been cut off from the earth;