Isaiah 9:15 - Ellicott's Commentary On The Whole Bible

The ancient and honourable... — Comp. Isaiah 3:2-3, for the meaning of the words. These, the prophet seems to say, were the true leaders of the people. The ideal work of the prophet was, indeed, that of a teacher who was to lead even them, but corruptio optimi pessima; and to Isaiah, as to Jeremiah, there was no class so contemptible and base as that of spiritual guides whose policy was that of a time-serving selfishness. The verse is rejected by some critics as a marginal note that has found its way into the text; but the prophet may well have given his own interpretation of this formula. (Comp. Isaiah 28:7; Isaiah 29:10; Jeremiah 14:14; Jeremiah 23:9-40.)