Thou hast made void the covenant of thy servant - Thou hast dealt with him as if there were no such covenant; as if no such promise had been made to him. The word rendered “made void,” means to abhor, or reject.
Thou hast profaned his crown, by casting it to the ground - literally, “Thou hast profaned to the earth his crown;” that is, Thou hast treated it as a polluted thing; a thing to be rejected and abhorred; a thing which one casts indignantly upon the ground.