John Wesley on Numbers 23:22

Out of Egypt - Namely, by a strong hand, and in spite of all their enemies, and therefore it is in vain to seek or hope to overcome them. He - Israel, whom God brought out of Egypt, such change of numbers being very common in the Hebrew language. The sense is, Israel is not now what he was in Egypt, a poor, weak, dispirited, unarmed people, but high and strong and invincible. An unicorn - The word may mean either a rhinoceros, or a strong and fierce kind of wild goat. But such a creature as an unicorn, as commonly painted, has no existence in nature.