He realized, he didn't want all of those slaves gone, so he sent his soldiers to get them back. They were already crossing the Red Sea that Moses had parted so they chased them. But Moses, with the help of God, closed the Red Sea on them and they all drowned. So the Israelites got back to their land and the Pharaoh didn't capture them.
He was dead.
the Egyptian Pharaoh
This is due to the fact that the plagues were specifically addressed against the Egyptians. It was the Egyptian Pharaoh who was refusing to let the Israelites go.
God instructed Moses to go to Pharaoh and demand the release of the Israelites from slavery in Egypt. He was to tell Pharaoh, "Let my people go, so that they may worship me in the wilderness."
In the Old Testament book of Exodus: Exo 9:7 Then Pharaoh sent, and indeed, not even one of the livestock of the Israelites was dead. But the heart of Pharaoh became hard, and he did not let the people go.
Pharaoh heart was hardened , so he would not let the Israelites free.
God turned Moses' rod into a serpent during the encounter at the burning bush, as a sign of His power to perform miracles. This event is described in the Book of Exodus in the Bible.
B/c of the ten plagues, but then he changed his mind and chased after the isrealites but was killed in the red sea when God dropped the waters on his army.
He hardened his heart and refused to let the Israelites go (Exodus ch.8). See also:More about the Exodus
He answered them more than once (Exodus ch.5 to 11), but the gist of all the answers was that he refused to free the Israelites. (Sometimes he spoke of his own volition, not as an answer, and did proclaim the Israelites' emancipation, but in each case [except ch.12] he soon retracted.)
Then Moses and Aaron came to Pharaoh, and said, LORD God of the Hebrews says: 'How long will you refuse to humble thyself before me? Let my people go, that they may serve me. Exodus 10: 3
The pharaoh at the time was Rameses.
Egypt's Pharaoh, Ramses II, was very stubborn and harsh at times. God sent the ten plagues because Pharaoh would not let God's people go, the Israelites. Pharaoh wanted them to continue as slaves, and when Moses asked him to let God's people go, Ramses refused, saying I am god! ( Egyptian pharaohs at the time believed they were sons of Ra, the Egyptian sun god.) Since God was mindful of His covenant (promise, agreement) with Abraham and Sarah (He promised them many descendants, as countless as the stars, and a great land), God sent the plagues in order for Egypt's pharaoh to believe and let God's people go. God didn't prefer to do this, but it was the only way to get Pharaoh to let the Israelites go free, to the promised land.