Студија
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.
In Isaiah 19:15, this signifies the interiors and exteriors of the church. (Arcana Coelestia 9656[2])
28 Through faith he kept the passover, and the sprinkling of blood, lest he that destroyed the first-born should touch them.