His mercy is on them that fear him— "So great is the goodness of God, that he rewards the piety of his servants upon their posterity to the thousandth generation." Exodus 20:6. By making this observation, the virgin modestly insinuated, that she imputed the great honour that was done her, not to any piety of her own, but to the piety of her ancestors, Abraham and David, which God thus rewarded upon their latest posterity.
Related Commentaries of Luke 1:50
Luke 1:50
50 And his mercy is on them that fear him from generation to generation.