Mount Horeb, Hebrew: חֹרֵב, Greek in the Septuagint: χωρηβ, Latin in the Vulgate: Horeb, is the mountain at which the book of Deuteronomy in the Hebrew Bible states that the Ten Commandments were given to Moses by God. It is described in two places (Exodus 3:1, 1 Kings 19:8) as הַר הָאֱלֹהִים the "Mountain of God". The mountain is also called the Mountain of YHWH.
In other biblical passages, these events are described as having transpired at Mount Sinai. Although Sinai and Horeb are often considered to have been different names for the same place, there is a body of opinion that they may have been different locations.
The Protestant reformer John Calvin took the view that Sinai and Horeb were the same mountain, with the eastern side of the mountain being called Sinai and the western side being called Horeb.Abraham Ibn Ezra suggested that there was one mountain, "only it had two tops, which bore these different names".
Horeb is thought to mean glowing/heat, which seems to be a reference to the Sun, while Sinai may have derived from the name of Sin, the Sumerian deity of the Moon, and thus Sinai and Horeb would be the mountains of the moon and sun, respectively.
The name Horeb first occurs at Exodus 3:1, with the story of Moses and the Burning bush. According to Exodus 3:5, the ground of the mountain was considered holy, and Moses was commanded by God to remove his shoes.