Treasury of Scripture Knowledge
"This month shall be to you the beginning of months. It shall be the first month of the year to you.
even to the next day after the seventh Sabbath you shall number fifty days; and you shall offer a new meal offering to Yahweh.
They took their journey from Elim, and all the congregation of the children of Israel came to the wilderness of Sin, which is between Elim and Sinai, on the fifteenth day of the second month after their departing out of the land of Egypt.
They traveled from Rephidim, and encamped in the wilderness of Sinai.