Exodus 9:27
And Pharaoh sent, and called for Moses and Aaron, and said to them, I have sinned this time: the LORD is righteous, and I and my people are wicked.
Nave's Topical Index—AKJV

Exodus 10:16,17
Then Pharaoh called for Moses and Aaron in haste; and he said, I have sinned against the LORD your God, and against you.
Nave's Topical Index—AKJV