'Mountain of God' in the Bible

Now Moses was keeping the flock of Jethro (Reuel) his father-in-law, the priest of Midian; and he led his flock to the west side of the wilderness and came to Horeb (Sinai), the mountain of God.

The Lord said to Aaron, “Go into the wilderness to meet Moses.” So he went and met him at the mountain of God (Sinai) and kissed him.

So Moses arose with Joshua his attendant, and he went up to the mountain of God.