Funda
29 And it came to pass at midnight, the Lord slew every firstborn in the land of Egypt, from the firstborn of Pharao, who sat on his throne, unto the firstborn of the captive woman that was in the prison, and all the firstborn of cattle.
An elder brother, as in Genesis 10:21, signifies the internal church.
(Izinkomba: Arcana Coelestia 1222)