'Generation' in the Bible
"Not a single person of this evil generation will see the good land that I promised to give to your ancestors!
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.
A person of illegitimate birth may not enter the assembly of the Lord; to the tenth generation no one related to him may do so.
An Ammonite or Moabite may not enter the assembly of the Lord; to the tenth generation none of their descendants shall ever do so,
Children of the third generation born to them may enter the assembly of the Lord.
The generation to come -- your descendants who will rise up after you, as well as the foreigner who will come from distant places -- will see the afflictions of that land and the illnesses that the Lord has brought on it.
His people have been unfaithful to him; they have not acted like his children -- this is their sin. They are a perverse and deceitful generation.
He said, "I will reject them, I will see what will happen to them; for they are a perverse generation, children who show no loyalty.