Isaiah 62:6 - Matthew Poole's English Annotations on the Holy Bible

Watchmen; understand by these, either, 1. Angels, as they are called, Daniel 4:13,23. Or 2. Magistrates: see Isaiah 56:10, or rather, 3. Ministers. When once the church shall be restored again, God will undertake for its safety and protection, partly by magistracy, and partly by ministry, whom he here by a metaphorical allegory calls watchmen; but the next words seem principally to intimate spiritual watchmen, thy spiritual safety, Hebrews 13:17, and said to be upon the walls, as being thence able to espy dangers at the greater distance, Song of Solomon 1:7. Which shall never hold their peace day nor night; there shall be a most vigilant and industrious ministry, their constancy being intimated by day and night, either in praying, or teaching, Or warning, this being their office. That make mention, i.e. are his servants. To make mention of one is, according to the Hebrew phrase, to be servant to him of whom we make mention, Isaiah 26:13. And here especially are meant his servants in ordinary, his remembrancers; either such as put God in mind of his promise, like such officers that great men have about them on purpose to mind them of the public affairs; or such as make the Lord to be remembered, putting his people in mind of him. Keep not silence: this seems to be the charge that he gives to his watchmen, that they never prove remiss or negligent.