'Barrier' in the Bible

(a third shall also be at the [city] gate Sur, and a third at the gate behind the guards); so you shall keep watch over the palace [from three posts] for defense.

‘Do you not fear Me?’ says the Lord.‘Do you not tremble [in awe] in My presence?For I have placed the sand as a boundary for the sea,An eternal decree and a perpetual barrier beyond which it cannot pass.Though the waves [of the sea] toss and break, yet they cannot prevail [against the sand ordained to hold them back];Though the waves and the billows roar, yet they cannot cross over [the barrier].[Is not such a God to be feared?]

On each side a border (barrier wall) one cubit wide stood in front of the guardrooms on each side; and the guardrooms were six cubits square on each side.

The princes of Judah are like those who move a boundary marker;I will pour out My wrath on them like [an unrestrained flood of] water.