And when they set out from Rephidim and came into the wilderness of Sinai, they encamped in the wilderness; and there Israel encamped before the mountain.
Now Moses was keeping the flock of his father-in-law, Jethro, the priest of Midian; and he led his flock to the west side of the wilderness, and came to Horeb, the mountain of God.
He said, “But I will be with you; and this shall be the sign for you, that I have sent you: when you have brought forth the people out of Egypt, you shall serve God upon this mountain.”