Luke 2:8

Shepherds] David himself had been a shepherd at Bethlehem (1 Samuel 16:11). The flocks at Bethlehem were destined for the Temple sacrifices, and the shepherds who kept them occupied a higher social position than other shepherds, who were considered outcasts by the scribes because of their necessary isolation from religious ordinances. There was a Jewish tradition that the birth of the Messiah would be proclaimed from the 'Migdol Eder,' 'the tower of the flock,' which lay near Bethlehem on the road to Jerusalem (Edersheim).