Deuteronomy 33:21

And he provided the first part for himself, a place of habitation as befitted a leader of the tribes, because there, in a portion of the lawgiver, of the leader, was he seated, this fine region was expressly set aside for him; and he came with the heads of the people, joined them in the campaign west of Jordan, he executed the justice of the Lord, and His judgments with Israel, in fulfilling the precepts of Jehovah, for herein the righteousness of the people consisted.