'Generations' in the Bible

But to be a witness between us and you, and between the future generations, that we have the right of worshipping the Lord with our burned offerings and our offerings of beasts and our peace-offerings; so that your children will not be able to say to our children in time to come, You have no part in the Lord.

For we said to ourselves, If they say this to us or to future generations, then we will say, See this copy of the Lord's altar which our fathers made, not for burned offerings or offerings of beasts, but for a witness between us and you.