God ties the accomplishing of His will to His people’s willingness to pray. He looks for "watchmen" who are committed to pray unceasingly and persistently for the fulfilment of His promises.
“I have posted watchmen on your walls, O Jerusalem; they will never be silent day or night. You who call on the LORD, give yourselves no rest, and give him no rest till he establishes Jerusalem and makes her the praise of the earth.”
In Isaiah’s time the cities of the Middle East