WEB
He also rebelled against king Nebuchadnezzar, who had made him swear by God: but he stiffened his neck, and hardened his heart against turning to Yahweh, the God of Israel.
YLT
and also, against king Nebuchadnezzar he hath rebelled, who had caused him to swear by God, and he hardeneth his neck, and strengtheneth his heart, against turning back unto Jehovah, God of Israel.