Though thou knewest. — The whole history of Nebuchadnezzar was known to Belshazzar. He had not, however, learned the moral lesson conveyed by it. He was therefore doubly guilty in the sight of God, because his blasphemy was wilful.
Related Commentaries of Daniel 5:22
Daniel 5:22
22 And thou his son, O Belshazzar, hast not humbled thine heart, though thou knewest all this;