'Holy Mountain' in the Bible

For on my holy mountain, on the mountain height of Israel, says the Lord GOD, there shall all the house of Israel, all of them in the land, serve me: there will I accept them, and there will I require your offerings, and the firstfruits of your offerings, with all your holy things.

You are the anointed cherub that covers; and I have set you so: you were upon the holy mountain of God; you have walked up and down in the midst of the stones of fire.