'Mountain of God' in the Bible

Now Moses kept the flock of Jethro his father-in-law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.

Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire.

By the multitude of thy merchandise they have filled the midst of thee with violence, and thou hast sinned: therefore I will cast thee as profane out of the mountain of God: and I will destroy thee, O covering cherub, from the midst of the stones of fire.