'Under The Hill' in the Bible

And Moses brought the people out of the tents to meet with God, and they stood under the hill.

Then Moses wrote all the words of the LORD and rose up early and made an altar under the hill, and twelve pillars according to the number of the twelve tribes of Israel,

ye came and stood also under the hill, and the hill burnt with fire: even unto the midst of heaven, and there was darkness, clouds and mist.