Numbers 23:9

9For from the top of the rocks I see him. Unless I am mistaken, the meaning is that, although he only beheld the people from afar, so that he could not accurately perceive their power from so high and distant a spot, still they portended to him something great and formidable. A closer view generally intimidates men; besides, a body of twenty thousand men then dazzles our sight, as if the number were five times as great: whilst the real extent of a thing is also more accurately ascertained. But Balaam declares, in the spirit of prophecy, that he sees far more in the people of God than their distance from him would allow; for, posted as he was on a high eminence, he would have only belleld them as dwarfs with the ordinary vision of men. He says, that “the people shall dwell alone,” as being by no means in want of external support: for לבדד, lebadad, is equivalent to solitarily or separately. It is said of the people, therefore, that they shall dwell in such a manner as to be content with their own condition, neither desiring the wealth or power of others, nor seeking their aid. The fact that the people had recourse at one time to the Egyptians, at another to the Assyrians, and entangled themselves in improper alliances, is not repugnant to this prophecy, in which the question is not as to the virtue of the people, but only as to the blessing of God, which is again celebrated in the same words in Deuteronomy 33:28

What follows, that “they shall not be reckoned among the nations,” must not be understood in depreciation of them, as if it were said that they should be of no credit or position; but the elect people is exalted above all others in dignity and excellence, as though he had said that there should be no nation under heaven equal to or comparable with them. And, although there were other kingdoms more illustrious for the flourishing condition of their people, and superior both in the number of their inhabitants, and in all kinds of prosperity, still this people never forfeited their pre-eminence, since they were distinguished, not so much by wealth and external endowments, as by the adoption of God. Thus, Mount Sion is called noble above all other mountains, because God had there chosen to make His abode. Others explain it that the people should be alone, so as not to be brought into comparison with the Gentiles, inasmuch as its religion should be separate from the whole world, and unmingled with heathen corruptions. The exposition which I have given is, however, more simple.