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.

For Yahweh will pass through to strike the Egyptians; and when he sees the blood on the lintel, and on the two side-posts, Yahweh will pass over the door, and will not allow the destroyer to come in to your houses to strike you.

For Jehovah will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side-posts, Jehovah will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you.

`And Jehovah hath passed on to smite the Egyptians, and hath seen the blood on the lintel, and on the two side-posts, and Jehovah hath passed over the opening, and doth not permit the destruction to come into your houses to smite.

When the LORD passes through to strike down the Egyptians, He will see the blood on the top and sides of the doorframe and will pass over that doorway; so He will not allow the destroyer to enter your houses and strike you down.