'Generation' in the Bible

'Yahweh is slow to anger, and abundant in loving kindness, forgiving iniquity and disobedience; and that will by no means clear [the guilty], visiting the iniquity of the fathers on the children, on the third and on the fourth generation.'

Yahweh's anger was kindled against Israel, and he made them wander back and forth in the wilderness forty years, until all the generation, who had done evil in the sight of Yahweh, was consumed.