'Mountain of God' in the Bible

The LORD told Aaron, "Go meet Moses in the desert." So Aaron went, found him at the mountain of God, and embraced him.

Moses' father-in-law Jethro, together with Moses' two sons and his wife, came to Moses in the desert where he was camped at the mountain of God.

So Moses got up, along with Joshua his servant, and went up on the mountain of God.