'Fence' in the Bible

How long will you attack a manSo that you may murder him, all of you,Like a leaning wall, like a tottering fence?

He who digs a pit [for others] may fall into it, and a serpent may bite him who breaks through a [stone] wall.

And the outer wall, by the side of the chambers, toward the outer courtyard facing the chambers, was fifty cubits long.