What wilt thou say, etc.? The rendering of the verse is uncertain, though the Authorized Version undoubtedly requires correction. The alternatives are, What wilt thou say when he shall appoint over thee (but thou thyself hast trained them against thee) familiar friends as thy head?
and, What wilt thou say when he shall appoint over thee those whom thou hast taught thy familiar friends as thy head? The rendering "familiar friends" is justified by Psalms 55:13; Proverbs 16:28; Proverbs 17:9; Micah 7:5.
The "captains" of Authorized Version, or rather "tribal chiefs," is unsuitable.