a wall
Exodus 14:22
And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left.
Job 1:10
Hast not thou made an hedge about him, and about his house, and about all that he hath on every side? thou hast blessed the work of his hands, and his substance is increased in the land.
Jeremiah 15:20
And I will make thee unto this people a fenced brasen wall: and they shall fight against thee, but they shall not prevail against thee: for I am with thee to save thee and to deliver thee, saith the LORD.
Zechariah 2:5
For I, saith the LORD, will be unto her a wall of fire round about, and will be the glory in the midst of her.