Exodus 12:22-24

Lexham English Bible

²² And take a bunch of hyssop and dip it into the blood that is in the basin and apply some of the blood that is in the basin to the lintel and the two doorposts. And you will not go out, anyone from the doorway of his house, until morning. ²³ And Yahweh will go through to strike Egypt, and he will see the blood on the lintel and on the two doorposts, and Yahweh will pass over the doorway and will not allow the destroyer to come to your houses to strike you.

²⁴ “And you will keep this event as a rule for you and for your children forever.^[a]