Targum Jonathan on Numbers
For, said Bileam the wicked, I look on this people who are led on for the sake of their righteous fathers, who are like the mountains, and of their mothers, who are like the hills: behold, this people alone are to possess the world, because they are not led by the laws of the nations.
Targum Jerusalem
I see this people, who are conducted through the merit of their righteous fathers, Abraham, Izhak, and Jakob, who are like the mountains, and of their four mothers, Sarah, Rivekah, Rahel, and Leah: behold, this people shall dwell alone, and not be mixed with the laws of the Gentiles.