Now because of this King Hezekiah and the prophet Isaiah, the son of Amoz, prayed and cried out to heaven. Then the Lord sent an angel who cut down every mighty man of valor, leader, and captain in the camp of the king of Assyria. So he returned shamefaced to his own land. And when he had gone into the temple of his god, some of his own offspring struck him down with the sword there. 2 Chr 32:20-21
Judah was faced with an impending military threat. They were about to be attacked by Assyria whose armies are far superior in every way. In response to this threat, the verse says that Hezekiah and Isaiah prayed and cried out to heaven. And the Lord responded with deliverance.
How often have we missed deliverance and help because we failed to pray? Because we failed to be aware the God is present at every situation we encounter, we attempt to handle the situation with our own wisdom and strength. This verse is a reminder that we ought to pray at all times. God is near us and will respond to our call for help.