Bring forth therefore fruits worthy of repentance, and don't begin to say among yourselves, 'We have Abraham for our father;' for I tell you that God is able to raise up children to Abraham from these stones!

 Here we have Luke's genealogy of Jesus. The Jews were interested in genealogies. Genealogies, especially of the priests, who had to prove unbroken descent from Aaron, were kept amongst the public records. In the time of Ezra and Nehemiah we read of priests who lost their office because they could not produce their genealogy ( Ezra 2:61-63; Nehemiah 7:63-65). 