Following the 10th plague, Pharaoh allowed Moses and Aaron to lead the children of Israel out of Egypt. After their departure, Pharaoh hardened his heart and sent his army after the Israelites, who were encamped near the Red Sea. The Lord miraculously allowed the children of Israel to pass through the Red Sea on dry ground to escape, while the army of Pharaoh was drowned. The people of Israel sang songs of praise and thanks to the Lord. Acting according to inspiration, Moses healed the waters of Marah.