Deuteronomy 1:9-18

(9-18) In these words Moses appears to combine the recollection of two distinct things: (1) the advice of Jethro (Exodus 18), by following which he would be relieved from the ordinary pressure of litigation; (2) the still further relief afforded him by the appointment of the seventy elders. These last received the gift of prophecy, and were thus enabled to relieve Moses from some of the higher responsibilities of his office by representing his mind and reproducing his personal influence in many parts of the camp at once. Jethro’s advice was given on their first arrival in Horeb: when it was carried into effect we are not told. The seventy elder were appointed (Numbers 11) between Sinai and Kadesh-barnea, shortly after they left Sinai. It is quite possible that both institutions came into existence at the same time. The seventy elders would have been of great service in the selection of the numerous judges and officers who were required.