'One Father' in the Bible

And Shemaiah the son of Nethanel the scribe, who was of the Levites, wrote them in the presence of the king, and the officiers, and Zadok the priest, and Ahimelech the son of Abiathar, and the heads of the ancestral houses of the priests and of the Levites; one fathers' house being taken for Eleazar, and one taken for Ithamar.

Do we not 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?

You do the works of your father." They said to him, "We were not born of sexual immorality. We have one Father, God."