'Deep' in the Bible

Now when he had left speaking, he said unto Simon, Launch out into the deep, and let down your nets for a draught.

He is like a man which built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock.

And they besought him that he would not command them to go out into the deep.