Hebrews 11:28 Through faith he kept the passover, and the sprinkling of blood, lest he that destroyed the firstborn should touch them.
(KJV)
Moses kept the passover. God told him that he would destroy the first-born of the Egyptians, but would spare all those whose doors were sprinkled with the blood of the paschal lamb. Moses believed this, kept the passover, and sprinkled the blood.
(Exodus 12:21)
Exodus 12:7 And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it.
Exodus 12:13 And the blood shall be to you for a token upon the houses where ye are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt
Exodus 12:23 For the LORD will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side posts, the LORD will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you.
1Peter 1:2 Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied.
Through faith ( in God’s promise, that upon seeing the blood of the paschal lamb upon the upper doorposts, and the two side-posts of the houses of the Israelites, he would pass over them, when he slew the first-born of the Egyptians, Ex 12:13,23) he kept the passover, and (observed) the sprinkling of (the) blood (of it; and this he did), lest he that destroyed the firstborn (see note on 1Co 10.10) should touch them (PLWL)
Through faith he kept the passover (Ex 12:3-30). He kept it because God commanded and he believed all God promised.
The sprinkling of blood. The blood of the lamb sprinkled on the door posts. He not only believed that this would protect Israel's first born, but his faith went beyond the type to the Lamb of God. (PNT)
