The 'storehouses' built by the enslaved Israelites denote doctrines from falsified truths.

In Malachi 3:10, Jeremiah 50:26, and Luke 12:24, they signify doctrines from truths in the natural, or from falsities there. Treasure cities, armories, and treasuries have roughly the same meaning. (Arcana Coelestia 6661)

They also signify knowledge of good and truth, for these hold the material out of which the faith of charity is formed. (Doctrine Regarding Faith 25)