Exodus 19:1
In the third month when the sons of Israel had gone forth out of the land of Egypt, on this day they came to the wilderness of Sinai.
Exodus 12:6
And you 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.
Exodus 16:1
And they took their journey from Elim, and all the congregation of the sons of Israel came into 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.
Numbers 33:15
And they pulled up stakes from Rephidim and pitched in the wilderness of Sinai.
Exodus 12:2
This month shall be to you the beginning of months. It shall be the first month of the year to you.
Leviticus 23:16-18
To the next day after the seventh sabbath you shall number fifty days. And you shall offer a new food offering to Jehovah.