Israel in Egypt

In order for the Pharaoh to release the Jews in kind, ten plagues had to be sent in turn throughout Egypt. Nine of them fell on the Egyptians directly from heaven - Moses only foreshadowed them to Pharaoh. ...
In the days of the tenth execution, sent by God to Pharaoh and his kingdom through Moses and Aaron, God commanded the Jews to prepare a sacrificial lamb and lubricate both the doorposts and the crossbar of the door of every Jewish house with its blood. The angel of death passed by the dwellings of the Israelites, striking only the Egyptian firstborn. Thus, God spared all the Jewish firstborn, defeating the Egyptian. Only after the death of all the Egyptian firstborn did Pharaoh allow the Jews to leave Egypt.