Isaiah 62:6,7 - Coke's Commentary on the Holy Bible

I have set watchmen, &c.— As much as to say, "since God, by the peculiar blessing of his providence, hath placed watchmen upon the walls of Jerusalem, who shall constantly watch for its safety; therefore do you, who are intrusted with this office, perform your parts diligently, and intercede continually with him, that he would graciously fulfil the magnificent promises which he hath made to his church." The word שׁמרים shomrim, rendered watchmen, signifies properly those priests and Levites who kept watch day and night about the temple, and is from them applied to the spiritual watch-men and ministers of the Christian church. See Vitringa.