Deuteronomy 29:5
29:5 I have led you through the desert for forty years. Your clothing has not worn out nor have your sandals deteriorated.
Deuteronomy 31:10
31:10 He commanded them: “At the end of seven years, at the appointed time of the cancellation of debts, at the Feast of Temporary Shelters,
Deuteronomy 32:7
32:7 Remember the ancient days;
bear in mind the years of past generations.
Ask your father and he will inform you,
your elders, and they will tell you.