God has planned to judge the wicked but to save the righteous; and He has prepared by way of salvation for the righteous.
God wants all human beings to be saved, instead of being destroyed by disaster.
What promise or covenant God has given us, so that we can be protected form such disaster.

Ex 12:11-14 This is how you are to eat it: with your cloak tucked into your belt, your sandals on your feet and your staff in your hand. Eat it in haste; it is the LORD's Passover.
"On that same night I will pass through Egypt and strike down every firstborn--both men and animals--and I will bring judgment on all the gods of Egypt. I am the LORD.
The blood will be a sign for you on the houses where you are; and when I see the blood, I will pass over you. No destructive plague will touch you when I strike Egypt.
"This is a day you are to commemorate; for the generations to come you shall celebrate it as a festival to the LORD -a lasting ordinance.

Passover is the feast of redemption, which implies "plagues pass over."
When the Israelites were slaves in Egypt, which represents this sinful world, they could escape the plagues through the blood of the Passover lamb. this historical event was a shadow; it shows that we can escape disasters through the blood of Christ, the Passover lamb. This is why god has given us the Passover.

In the Old testament times, God placed the blood of the lamb on the sides and tops of the doorframes of the houses. In the New Testament times, however, God puts a mark on the forehead of each person.
Let us engrave deep in our hearts the precious covenant which god established through His blood.