'Wall' in the Bible

My beloved is like to a roe, Or to a young one of the harts. Lo, this -- he is standing behind our wall, Looking from the windows, Blooming from the lattice.

If she is a wall, we build by her a palace of silver. And if she is a door, We fashion by her board-work of cedar.

I am a wall, and my breasts as towers, Then I have been in his eyes as one finding peace.