Deuteronomy 1:3
And it happened, in the fortieth year, in the eleventh month, on the first of the month, Moses spoke to the sons of Israel according to all that Jehovah had commanded him concerning them;
Numbers 33:38
And Aaron the priest went up to Mount Hor at the command of Jehovah and died there, in the fortieth year after the sons of Israel had come up out of the land of Egypt, in the first of the fifth month.
Numbers 20:1
Then the sons of Israel came, the whole congregation, into the desert of Zin in the first month. And the people stayed in Kadesh. And Miriam died there and was buried there.
Deuteronomy 4:1-2
And now, Israel, listen to the statutes and to the judgments which I teach you, in order to do them, so that you may live and go in and possess the land which Jehovah, the God of your fathers gives you.