Exodus 14:3-5 Living Bible (TLB)
3 For Pharaoh will think, ‘Those Israelites are trapped now, between the desert and the sea!’ 4 And once again I will harden Pharaoh’s heart and he will chase after you. I have planned this to gain great honor and glory over Pharaoh and all his armies, and the Egyptians shall know that I am the Lord.”
So they camped where they were told.
5 When word reached the king of Egypt that the Israelis were not planning to return to Egypt after three days, but to keep on going, Pharaoh and his staff became bold again. “What is this we have done, letting all these slaves get away?” they asked.