Numbers 26:52-56

52Adonai then spoke to Moses saying,

53“The land is to be divided to these as an inheritance according to the number of names.

54For the larger, you are to make his inheritance larger, and to the smaller you are to make his inheritance smaller. Each is to receive his inheritance in proportion to his population.

55Certainly the land is to be divided by lot. They will inherit it according to the names of their ancestral tribes.

56The division of the inheritance of larger and smaller tribes is to be decided by the lot.”