'Generation' in the Bible

Jehovah is slow to anger, and abundant in lovingkindness, forgiving iniquity and transgression; and that will by no means clear the guilty , visiting the iniquity of the fathers upon the children, upon the third and upon the fourth generation.

And Jehovah's anger was kindled against Israel, and he made them wander to and fro in the wilderness forty years, until all the generation, that had done evil in the sight of Jehovah, was consumed.