'Fathers' in the Bible

Don't we all have one father? Hasn't one God created us? Why do we deal treacherously every man against his brother, profaning the covenant of our fathers?

From the days of your fathers you have turned aside from my ordinances, and have not kept them. Return to me, and I will return to you," says Yahweh of Armies. "But you say, 'How shall we return?'

He will turn the hearts of the fathers to the children, and the hearts of the children to their fathers, lest I come and strike the earth with a curse."