Adam Clarke on Isaiah 21:17

The archers, the mighty men of the children of Kedar "The mighty bowmen of the sons of Kedar" - Sagittariorum fortium, Vulg.; transposing the two words, and reading גבורי קשה gibborey kesheth; which seems to be right. The strong men of the bow, the most excellent archers.

For the Lord - hath spoken it "For Jehovah hath spoken it" - The prophetic Carmina of Marcius, foretelling the battle of Cannae, lib. 25:12, conclude with the same kind of solemn form: Nam mihi ita Jupiter fatus est; "Thus hath Jupiter spoken to me." Observe that the word נאם naam, to pronounce, to declare, is the solemn word appropriated to the delivering of prophecies: "Behold, I am against the prophets, saith (נאם naam, pronounceth) Jehovah, who use their tongues, וינאמו נאם vaiyinamu neum, and solemnly pronounce, He hath pronounced it;" Jer 23:31. What God says shall most assuredly come to pass; he cannot be deceived.