Deuteronomy 1:3

3 aIn the fortieth year, on the first day of the eleventh month, Moses spoke to the people of Israel according to all that the Lord had given him in commandment to them,

Deuteronomy 8:2

2And you shall remember the whole way that the Lord your God has led you bthese forty years in the wilderness, that he might humble you, ctesting you dto know what was in your heart, ewhether you would keep his commandments or not.
Copyright information for ESV