Rashi on Numbers 26:56/רש"י על במדבר כ״ו:נ״ו

1על פי הגורל ACCORDING TO (more lit., by the mouth of) THE LOT [SHALL THE POSSESSION BE DIVIDED] — The lot itself spoke as I have already explained; this tells us that the division took place by the Holy Spirit (Midrash Tanchuma, Pinchas 6).