cedars ... could not hide him - could not outtop him. No other king eclipsed him.
were not like - were not comparable to.
garden of God - As in the case of Tyre (Eze 28:13), the imagery, that is applied to the Assyrian king, is taken from Eden; peculiarly appropriate, as Eden was watered by rivers that afterwards watered Assyria (Gen 2:10-14). This cedar seemed to revive in itself all the glories of paradise, so that no tree there outtopped it.