Bible Verses About Priests: During patriarchal age heads of families acted as

And Noah builded an altar unto Jehovah, and took of every clean beast, and of every clean bird, and offered burnt-offerings on the altar.

And he removed from thence unto the mountain on the east of Beth-el, and pitched his tent, having Beth-el on the west, and Ai on the east: and there he builded an altar unto Jehovah, and called upon the name of Jehovah.

And he built there an altar, and called the place El-beth-el; because there God was revealed unto him, when he fled from the face of his brother.