Deuteronomy 32:27-28

Were it not that I feared the wrath of the enemy Their rage against me, as it is expressed Isaiah 37:28; their furious reproaches against my name, as if I were cruel to my people, or unable to deliver them. This is spoken after the manner of men; and the meaning is, that it would have been righteous in God to cut them entirely off and wipe out their very memory from the earth; but such a sudden and final destruction of a people in whose behalf God had done so much, for establishing his true worship among them, and for conveying it from them to the rest of the world, would have occasioned those heathen to insult God himself, by ascribing their destruction to their own valour, or to the power of their idols, and not to his righteous judgment. Therefore, to prevent this wrong construction of such desolating judgments, it became the divine wisdom to defer the execution of them. We find Moses more than once representing before God the blasphemous reflections which the heathen would make, in case of the total destruction of the Israelitish nation, as an argument to avert the effects of the divine displeasure. Void of counsel Their enemies are ignorant and foolish, and therefore would readily form such a false and foolish judgment upon things.