formula that places the prophecy in messianic times in the Day of the Lord, the consummation period of the nation’s history (cf. v.27). The promise relates to a “new covenant” and is a prediction of a radical change in God’s economy (i.e., his dealing with humanity). Thus when Jeremiah foretold a new covenant, by implication the Mosaic covenant became the old one (cf. Heb. 8:13). Moreover, the new covenant is an eternal one. National covenants do not die because of old age. The old covenant spoke