In the Old Testament, God, through Moses, sent 10 plagues to the Egyptians. The 10th plague was if the door of the home was not marked with the blood of the lamb and the family did not eat the lamb, then the first born child was killed. Thousands of children were killed including the Pharaoh’s child. Because of the death of his child, Pharaoh let God’s people go and the Israelites were freed passing from bondage and death to freedom and life because they were marked by the blood of the perfect unblemished lamb. Now moving forward in time, when Jesus, the perfect unblemished lamb, died on the cross and rose from the dead, He united the Israelites and the Egyptians. Remember Egyptians’ first born children died, the Israelites were saved by the blood of the lamb and through Pharaoh’s child’s death because that is when Pharaoh freed them. Jesus fulfilled the prophecy and blessing given to Abraham: that all nations would be saved because of his faith (In the Old Testament the Israelites were God’s chosen people and nobody else, but Jesus’ death brought all nations including the Gentiles, Samaritans, and all people into God’s family). The way he did this was by Him dying as the first born of God, like the first born of the Egyptians and Him rising from death to life like the Israelites were passed from death (slavery and bondage) to life (freedom) because of the death of the first born of Pharaoh (in this case God). So by Jesus fulfilling both rolls, the Egyptians (or in the New Testament the well-known Gentiles and all nations besides Israelites) and the Israelites, He unified all people making all nations blessed and infusing every person into the family of God as long as they choose God before sin.