(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.
Deuteronomy 1:9-18
9 And I spake unto you at that time, saying, I am not able to bear you myself alone:
10 The LORD your God hath multiplied you, and, behold, ye are this day as the stars of heaven for multitude.
11 (The LORD God of your fathers make you a thousand times so many more as ye are, and bless you, as he hath promised you!)
12 How can I myself alone bear your cumbrance, and your burden, and your strife?
13 Taked you wise men, and understanding, and known among your tribes, and I will make them rulers over you.
14 And ye answered me, and said, The thing which thou hast spoken is good for us to do.
15 So I took the chief of your tribes, wise men, and known, and madee them heads over you, captains over thousands, and captains over hundreds, and captains over fifties, and captains over tens, and officers among your tribes.
16 And I charged your judges at that time, saying, Hear the causes between your brethren, and judge righteously between every man and his brother, and the stranger that is with him.
17 Ye shall not respectf persons in judgment; but ye shall hear the small as well as the great; ye shall not be afraid of the face of man; for the judgment is God's: and the cause that is too hard for you, bring it unto me, and I will hear it.
18 And I commanded you at that time all the things which ye should do.