And when Hezekiah saw that Sennacherib was come, and that he was purposed to fight against Jerusalem,
When Hezekiah saw that Sennacherib had come and intended to fight against Jerusalem,
When Hezekiah realized that Sennacherib also planned on fighting Jerusalem,
And when Hezekiah had seen this, specifically that Sennacherib had arrived, and that the entire force of the war was turning against Jerusalem,