Adam Clarke on Jeremiah 31:40

The whole valley of the dead bodies - The valley of the son of Hinnom.

And all the fields unto the brook of Kidron, unto the corner of the horse-gate toward the east - All these places, the fuller's field, etc., shall be consecrated to the Lord, and become a part of this new city; so that this will appear to be a city much more extensive than the city of Jerusalem ever was; and to be suited to that time, when the people shall have the law written in their hearts, and God shall have filled the land with the seed of man, and with the seed of beast. Talia saecla currite! "Make speed, ye happy times!"