'Depths of the Sea' in the Bible

The Lord said, "I will bring you again from Bashan, I will bring you again from the depths of the sea;

Isn't it you who dried up the sea, the waters of the great deep; who made the depths of the sea a way for the redeemed to pass over?

He will again have compassion on us. He will tread our iniquities under foot; and you will cast all their sins into the depths of the sea.

but whoever causes one of these little ones who believe in me to stumble, it would be better for him that a huge millstone should be hung around his neck, and that he should be sunk in the depths of the sea.