Deuteronomy 16:18

18. In the administration of justice, when the Israelites should be settled in the Promised Land, there was need of a stable form of government. Moses had already arranged for the appointment of civil officers to settle the disputes of the people. See Exodus 18:0. That method was adapted to their life in the camp and on the march. Moses now provides for (1) civil officers in every town, and gives directions as to their judicial proceedings.

Deuteronomy 16:18 to Deuteronomy 23:7. (2) He arranges for a high judicial court at the central sanctuary. Deuteronomy 17:8-13. (3) Finally, he gives direction for the choice of a king. Deuteronomy 17:14-20.

Judges and officers shalt thou make thee in all thy gates No rule is laid down as to the number of these officers. They were to be, probably, in proportion to the number of inhabitants.