| Gill's Exposition of the Entire Bible So the house of Israel shall know that I am the Lord their God,.... That has chosen them, redeemed them, called them, manifested his covenant love and grace to them, and protected and defended them: this destruction of their enemies will be a proof of it; and they will hereby be led into a clearer knowledge of him, and of his goodness to them; and make a more firm and constant profession of him, even from that day and forward, to the end of time; for after this the Jews will no more apostatize, but will for ever remain the people of God and Christ.
Geneva Study BibleSo the house of Israel shall know that I am the LORD their God from that day and forward.
Jamieson-Fausset-Brown Bible Commentary22. So the house of Israel shall know . Lord-by My interposition for them. So, too, the heathen shall be led to fear the name of the Lord (Ps 102:15).
Matthew Henry's Concise Commentary39:11-22 How numerous the enemies which God destroyed for the defence of his people Israel! Times of great deliverances should be times of reformation. Every one should help the utmost he can, toward cleansing the land from reproach. Sin is an enemy every man should strive against. Those engaged in public work, especially of cleansing and reforming a land, ought to be men who will go through with what they undertake, who will be always employed. When good work is to be done, every one should further it. Having received special favours from God, let us cleanse ourselves from all evil. It is a work which will require persevering diligence, that search may be made into the secret recesses of sin. The judgments of the Lord, brought upon sin and sinners, are a sacrifice to the justice of God, and a feast to the faith and hope of God's people. See how evil pursues sinners, even after death. After all that ambitious and covetous men do and look for, a place of graves is all the Lord gives them on earth, while their guilty souls are doomed to misery in another world. | 
