Exodus 19:1
"In the third month, when the children of Israel were gone forth out of the land of Egypt, the same day came they into the wilderness of Sinai."
Cross References (ranked by relevance)
And they took their journey from Elim, and all the congregation of the children of Israel came unto 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.
And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening.
And they departed from Rephidim, and pitched in the wilderness of Sinai.
This month shall be unto you the beginning of months: it shall be the first month of the year to you.