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 spake unto the children of Israel, according unto all that the Lord had given him in commandment unto them;
Cross-reference
In Deuteronomy 8:2, the 40 years are recalled as testing; here Moses begins his speech at the close of that period.
In Deuteronomy 29:5, Moses reminds Israel of God's provision during the 40 years; here he speaks at the end of that time.
In Numbers 14:33, the 40-year punishment is decreed; here Moses speaks at the end of those 40 years, fulfilling that decree.
In Numbers 20:1, the fortieth year begins with Israel at Kadesh; here Moses speaks at the end of that same year, marking a chronological link.
In Numbers 33:38, Aaron's death is dated to the fortieth year, fifth month; here Moses speaks in the eleventh month, showing the timeline.
In Joshua 3:1, Israel crosses the Jordan after Moses' death; here Moses speaks just before his death, a sequential narrative link.
In Joshua 5:6, the 40 years are explained as punishment; here Moses speaks at the conclusion of that period.
In Psalm 95:10, the 40 years are recalled as a time of God's displeasure; here Moses addresses the new generation after that period.