Deuteronomy 6:2

6:2 and that you may so revere the Lord your God that you will keep all his statutes and commandments that I am giving you – you, your children, and your grandchildren – all your lives, to prolong your days.

Deuteronomy 9:9

9:9 When I went up the mountain to receive the stone tablets, the tablets of the covenant that the Lord made with you, I remained there forty days and nights, eating and drinking nothing.

Deuteronomy 9:18

9:18 Then I again fell down before the Lord for forty days and nights; I ate and drank nothing because of all the sin you had committed, doing such evil before the Lord as to enrage him.

Deuteronomy 10:10

10:10 As for me, I stayed at the mountain as I did the first time, forty days and nights. The Lord listened to me that time as well and decided not to destroy you.

Deuteronomy 16:4

16:4 There must not be a scrap of yeast within your land for seven days, nor can any of the meat you sacrifice on the evening of the first day remain until the next morning.

Deuteronomy 16:8

16:8 You must eat bread made without yeast for six days. The seventh day you are to hold an assembly for the Lord your God; you must not do any work on that day.

Deuteronomy 16:15

16:15 You are to celebrate the festival seven days before the Lord your God in the place he chooses, for he will bless you in all your productivity and in whatever you do; so you will indeed rejoice!