Passover is the Jewish celebration lasting seven to eight days (seven in Israel, eight outside of it) that marks the freedom of the Jews from enslavement by the Egyptians. According to the Old Testament, the Jews, led by Moses, had requested freedom from the Pharaoh of Egypt, but were denied. To punish the Egyptians, God sent the 10 plagues to Egypt to convince the Pharaoh to release the Jews. The last of these plagues, and the most devastating, was to kill the firstborn male in each Egyptian household.