Thou shalt swear, The Lord liveth - Thou shalt not bind thyself by any false god; thou shalt acknowledge Me as the Supreme. Bind thyself By me, and To me; and do this in truth, in judgment, and in righteousness.

The nations shall bless themselves in him - They shall be so fully convinced of the power and goodness of Jehovah in seeing the change wrought on thee, and the mercies heaped upon thee, that their usual mode of benediction shall be, May the God of Israel bless thee!

And thou shalt swear, the Lord liveth,.... Or by the living Lord, by him and him only; not by the creatures, but by the God of truth. This is sometimes put for the whole worship and service of God, Deuteronomy 6:13 and for a confession of Christ, and profession of faith in him, Isaiah 45:23, compared with Romans 14:11 and which ought to be done,

in truth, in righteousness, and in judgment; in sincerity, integrity, and uprightness of soul; in spirit and in, truth; in righteousness and true holiness:

and the nations shall bless themselves in him, not in Israel, as the Targum, Jarchi, and Kimchi, interpret it; but in the Lord, even in the Messiah, the Lord Jesus Christ, in whom all the nations of the earth were to be blessed with all spiritual blessings; with which being blessed, they call and count themselves happy, being pardoned through the blood of Christ, justified by his righteousness, and having peace, life, and salvation by him, Genesis 22:18,

and in him shall they glory; not in themselves, nor in any creature, or creature enjoyment; but in the Lord, and in what he is to them, wisdom, righteousness, sanctification, and redemption; in whom all the seed of Israel, being justified, glory; see 1 Corinthians 1:30. The sense of the words seems to be, that upon the Gospel being preached by Christ and his apostles to the Israelites, and some of them being converted, and their abominations put away, and they cleaving to the Lord, and to his worship; the Gentiles should have the Gospel sent to them, and receive it, and place all their blessedness in Christ, and glory in him.

And thou shalt {b} swear, The LORD liveth, in truth, in judgment, and in righteousness; and the nations shall bless themselves in him, and in him shall they glory.

(b) You will detest the name of idols, Ps 16:4 and will with reverence swear by the living God, when your oath may advance God's glory, and profit others: and here by swearing he means the true religion of God.

4:2 Swear - This is put here for the whole worship of God, acknowledging an and owning God as the only God; which is strongly exprest by this act. In truth - That the matter and substance of it be true. In judgment - Deliberately, advisedly, and reverently. In righteousness - That none be injured by it, that the things we engage be both lawful and possible, and that we look to the performance. The nations - This shall be a means to work upon the Heathen nations, to come into the same way of worship. They shall think themselves happy to be incorporated with thee, that it may be with them according to that promise, Gen 12:3. Glory - Whereas before they gloried in their idols, they shall glory in God alone.

2. And thou-rather, "And if (carried on from Jer 4:1) thou shalt swear, 'Jehovah liveth,' in truth, &c.", that is, if thou shalt worship Him (for we swear by the God whom we worship; compare De 6:13; 10:20; Isa 19:18; Am 8:14) in sincerity, &c.

and the nations-Rather, this is apodosis to the "if"; then shall the nations bless themselves in (by) Him" (Isa 65:16). The conversion of the nations will be the consequence of Israel's conversion (Ps 102:13, 15; Ro 11:12, 15).

4:1,2 The first two verses should be read with the last chapter. Sin must be put away out of the heart, else it is not put away out of God's sight, for the heart is open before him.