Exodus 13:14

13:14 In the future, when your son asks you ‘What is this?’ you are to tell him, ‘With a mighty hand the Lord brought us out from Egypt, from the land of slavery.

Exodus 14:5

14:5 When it was reported to the king of Egypt that the people had fled, the heart of Pharaoh and his servants was turned against the people, and the king and his servants said, “What in the world have we done? For we have released the people of Israel from serving us!”