Numbers 14:32-34
14:32 But as for you, your dead bodies will fall in this wilderness,
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.