For they were departed from Rephidim, and were come to the desert of Sinai, and had pitched in the wilderness; and there Israel camped before the mount.
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.
And he said, Certainly I will be with you; and this shall be a token to you, that I have sent you: When you have brought forth the people out of Egypt, you shall serve God on this mountain.