Jeremiah 3:6-6:30, is a new discourse, delivered in Josiah’s reign. It consists of two parts, the former extending to Jer 4:3, in which he warns Judah from the example of Israel’s doom, and yet promises Israel final restoration; the latter a threat of Babylonian invasion; as Nabopolassar founded the Babylonian empire, 625 b.c., the seventeenth of Josiah, this prophecy is perhaps not earlier than that date (Jer 4:5, etc.; Jer 5:14, etc.; Jer 6:1, etc.; Jer 22:1-30); and probably not later than the second thorough reformation in the eighteenth year of the same reign.
backsliding - literally, “apostasy”; not merely apostate, but apostasy itself, the essence of it (Jer 3:14, Jer 3:22).