2 Kings 18:12

because they obeyed not the voice of the Lord, their God, but transgressed His covenant, and all that Moses, the servant of the Lord, commanded, and would not hear them nor do them. Cf 2 Kings 17:5. The account is here repeated because the catastrophe which overtook Israel was of great importance to the entire covenant people and probably aided Hezekiah in carrying out his reforms, since the people continually had the warning example of their northern neighbors before them.