Commentaries
21:1-10 When the siege had begun, Zedekiah sent to ask of Jeremiah respecting the event. In times of distress and danger, men often seek those to counsel and pray for them, whom, at other times, they despise and oppose; but they only seek deliverance from punishment. When professors continue in disobedience, presuming upon outward privileges, let them be told that the Lord will prosper his open enemies against them. As the king and his princes would not surrender, the people are exhorted to do so. No sinner on earth is left without a Refuge, who really desires one; but the way of life is humbling, it requires self-denial, and exposes to difficulties.
4. God of Israel—Those "wondrous works" (Jer 21:2) do not belong to you; God is faithful; it is you who forfeit the privileges of the covenant by unfaithfulness. "God will always remain the God of Israel, though He destroy thee and thy people" [Calvin].
turn back the weapons—I will turn them to a very different use from what you intend them. With them you now fight against the Chaldees "without the walls" (the Jewish defenders being as yet able to sally forth more freely, and defend the fountains outside the walls in the valley under Mount Zion; see Jer 21:13; Jer 19:6, 7); but soon ye shall be driven back within the city [Maurer], and "in the midst" of it, I will cause all your arms to be gathered in one place ("I will assemble them," namely, your arms) by the Chaldean conquerors [Grotius], who shall slay you with those very arms [Menochius].