'Bars' in the Bible

Also the tree of the field will yield its fruit and the earth will yield its produce; and My people will be secure on their land. Then they will know [with confidence] that I am the Lord, when I have broken the bars of their yoke and have rescued them from the hand of those who made them slaves.

and you will say, ‘I will go up against an open country; I will come against those who are at rest and peaceful, who live securely, all of them living without walls and having neither bars nor gates,