And the whole valley of the dead bodies, and of the ashes, and all the fields unto the brook of Kidron, unto the corner of the horse gate toward the east, shall be holy unto the LORD; it shall not be plucked up, nor thrown down any more forever.
All Commentaries on Jeremiah 31:40 Go To Jeremiah 31
Jerome
AD 420
Then it continues, “to the corner gate.” It is made a corner lest any true justice or any certain victory be thought demonstrable in this world. And the corner gate itself, though it may be “in the east,” whence the light originates, is nevertheless called “horse gate,” this to teach us that we need to ride and to fight, so that we may deserve to hear with the Lord, “You mounted your horses and the salvation of your chariot.” The sanctification of the Lord is placed in the eastern gate, the gate of chariots, that we may be deemed perfect when we say to the Lord, “The chariot of God is tens of thousands of joyful people, for the Lord is among them.” In this way, the building that is established on the foundation of Christ, about which the apostle also said, “as a wise architect, I laid a foundation,” will never be destroyed but will remain forever.