ישעיהו נז:יא פירוש: רש״י ואבן עזרא

And whom did you dread Of whom were you afraid?

And of whom hast thou been afraid, etc. What hadst thou to fear from an enemy and to be afraid of him for, so as to lie, and not to think of me.

that you failed Heb. תְּכַזֵּבִי, that you ceased to worship Me and you betrayed Me. Comp. (infra 58:11) “Whose water shall not fail (יְכַזְּבוּ).” Comp. also (Psalms 116:11) “Every man is a traitor (כֹּזֵב).” Falajjnc in O.F., to fail. Likewise, every expression of כָּזָב means one upon whom people rely, and he fails and betrays them.