'Mouth of the Cave' in the Bible

And Joshua said, Roll great stones upon the mouth of the cave, and set men by it for to keep them:

Then said Joshua, Open the mouth of the cave, and bring out those five kings unto me out of the cave.

And it came to pass at the time of the going down of the sun, that Joshua commanded, and they took them down off the trees, and cast them into the cave wherein they had hidden themselves, and laid great stones on the mouth of the cave, unto this very day.

And when Elijah heard it, he covered his face with his mantle, and went out and stood in the mouth of the cave. And see, there came a voice unto him and said, "What doest thou here Elijah?"