Deuteronomy 1:3
And it came to pass in the fortieth year, in the eleventh month, on the first day of the month, that Moses spoke to the sons of Israel, according to all that LORD had given him in commandment to them,
Numbers 33:38
And Aaron the priest went up onto mount Hor at the commandment of LORD, and died there, in the fortieth year after the sons of Israel came out of the land of Egypt, in the fifth month, on the first day of the month.
Numbers 20:1
And the sons of Israel, even the whole congregation, came into the wilderness of Zin in the first month, and the people abode in Kadesh. And Miriam died there, and was buried there.
Deuteronomy 4:1-2
And now, O Israel, hearken to the statutes and to the ordinances, which I teach you, to do them, that ye may live, and go in and possess the land which LORD, the God of your fathers, gives you.