Grace that opens prison doors.

I have set watchmen upon thy walls, O Jerusalem,
which shall never hold their peace day nor night:
ye that make mention of the LORD, keep not silence,
And give him no rest, till he establish, and till he make Jerusalem a praise in the earth.
The LORD hath sworn by his right hand, and by the arm of his strength, Surely I will no more give thy corn to be meat for thine enemies;
and the sons of the stranger shall not drink thy wine, for the which thou hast laboured:
But they that have gathered it shall eat it, and praise the LORD;
and they that have brought it together shall drink it in the courts of my holiness.

Isaiah 62:6-9