Numbers 14:33-34

14:33 and your children will wander in the wilderness forty years and suffer for your unfaithfulness, until your dead bodies lie finished in the wilderness. 14:34 According to the number of the days you have investigated this land, forty days – one day for a year – you will suffer for your iniquities, forty years, and you will know what it means to thwart me.

Numbers 32:13

32:13 So the Lord’s anger was kindled against the Israelites, and he made them wander in the wilderness for forty years, until all that generation that had done wickedly before the Lord was finished.

Deuteronomy 1:3

1:3 However, it was not until the first day of the eleventh month of the fortieth year that Moses addressed the Israelites just as the Lord had instructed him to do.

Deuteronomy 2:14-16

2:14 Now the length of time it took for us to go from Kadesh Barnea to the crossing of Wadi Zered was thirty-eight years, time for all the military men of that generation to die, just as the Lord had vowed to them. 2:15 Indeed, it was the very hand of the Lord that eliminated them from within the camp until they were all gone.

Instructions Concerning Ammon

2:16 So it was that after all the military men had been eliminated from the community,

Hebrews 3:9-10

3:9 “There your fathers tested me and tried me, and they saw my works for forty years.

3:10 “Therefore, I became provoked at that generation and said, ‘Their hearts are always wandering and they have not known my ways.’

Hebrews 3:17

3:17 And against whom was God provoked for forty years? Was it not those who sinned, whose dead bodies fell in the wilderness?