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 children of Israel, according to all that the LORD had given him in commandment to them;
Deuteronomy 1:3 Cross References - Webster
Numbers 20:1
1 Then came the children of Israel, even the whole congregation, into the desert of Zin in the first month; and the people abode in Kadesh; and Miriam died there, and was buried there.
Numbers 33:38
38 And Aaron the priest ascended mount Hor at the commandment of the LORD, and died there, in the fortieth year after the children of Israel departed from the land of Egypt, in the first day of the fifth month.
Deuteronomy 4:1-2
1 Now therefore hearken, O Israel, to the statutes and to the judgments, which I teach you, to do them, that ye may live, and go in and possess the land which the LORD God of your fathers giveth you.
2 Ye shall not add to the word which I command you, neither shall ye diminish aught from it, that ye may keep the commandments of the LORD your God which I command you.