Deuteronomy 1:3
However, it was not until the first day of the eleventh month of the fortieth year that Moses addressed the Israelites just as the Lord had instructed him to do.
Numbers 33:38
Aaron the priest ascended Mount Hor at the command of the Lord, and he died there in the fortieth year after the Israelites had come out of the land of Egypt on the first day of the fifth month.
Numbers 20:1
Then the entire community of Israel entered the wilderness of Zin in the first month, and the people stayed in Kadesh. Miriam died and was buried there.
Deuteronomy 4:1-2
Now, Israel, pay attention to the statutes and ordinances I am about to teach you, so that you might live and go on to enter and take possession of the land that the Lord, the God of your ancestors, is giving you.