Deuteronomy 33:29

Saved by the Lord, the giver and preserver of all that excellency, that glory, safety, and happiness, which thou hast above all other people, which thou dost not obtain either by or for thy own wisdom, or strength, or goodness. The sword of thy excellency, or, thy most excellent sword, i.e. thy strength and the author of all this, past or approaching victories. Shall be found liars unto thee, i.e. shall be deceived, as to all their vain hopes and confidences of destroying thee or saving themselves, whether grounded upon their own numbers, and valour, and strong holds, or upon old prophecies and predictions of success, or upon their idols. Or, shall lie unto thee, i.e. shall submit themselves to thee, though it be done but feignedly and by constraint, as this phrase is used, Psalms 18:44, Psalms 66:3 81:15. Possibly this may design the lies and frauds which the Gibeonites would use to deceive them, Joshua 9:4. Thou shalt tread upon their high places, i.e. thou shalt subdue their greatest princes, and their strongest holds, Deuteronomy 32:13, and their idols, temples, and worship.