'Boundary' in the Bible

Do you not fear Me?This is the Lord’s declaration.Do you not tremble before Me,the One who set the sand as the boundary of the sea,an enduring barrier that it cannot cross?The waves surge, but they cannot prevail.They roar but cannot pass over it.

The boundary line will extend beyond that, straight west from there to the Hill of Gareb and then turn southward to Goah.