He is the Load

Exodus 12:29-51
At midnight the Load struck down all the first born of Egyptian from Pharaoh to the prisoner, there was loud wailing in Egypt, for there was not a house without someone dead.
The Egyptian urged the people to hurry and leave the country.
The Israelites did as Moses instructed and asked Egyptians for articles of silver and gold and for clothing. Load made the Egyptians favorable disposed toward the people, and gave them what they asked for.
The Israelite people lived in Egypt was 340 years. All the Load's division left Egypt
On this night all the Israelites are to keep vigil to honor the Load for generations to come.
No foreigner is to eat meat of Passover. As alien who wants to celebrate the Load's Passover must have all the males in hos household circumcised. Do not break any of the bones, The whole community of Israel must celebrate it.
Why?
The Load did what he instructed all the Load's divisions left Egypt. God has his plan and procedure.
God's work is suddenly and efficiently, precised.
Because it was left Egypt at night so people ate meat of Passover need eat with cloak tucked into your belt, sandal on their feet.
Egyptian suffer such big trouble so them hope Israelites leave hurry, and The Load let them favorable disposed toward the people. God may change people's favorable mind.
Just as God foretold(Gen 15:13-14) after 4 centuries in a foreign land Israel is free.
As Israel's freedom has been purchased by nation's firstborn of Egypt, the nation's firstborn belong in a special sense to God and are to be bought back.
Lamb of Passover means Jesus salvation.
How?
God has plan, He knows everything and He is the mighty God.
The rule of Passover express the salvation of Jesus in the future plan from The Load
Dear Load leading my way, May your mind be done in my nation and in my home. Leading my way on your way, let me comfort with your leading with joy.