(9) Thereupon I said to you, “I cannot bear the burden of you by myself.(10) Your God יהוה has multiplied you until you are today as numerous as the stars in the sky.—(11) May יהוה, the God of your ancestors, increase your numbers a thousandfold, and bless you as promised.—(12) How can I bear unaided the trouble of you, and the burden, and the bickering!

(13) Next day, Moses sat as magistrate among the people, while the people stood about Moses from morning until evening.(14) But when Moses’ father-in-law saw how much he had to do for the people, he said, “What is this thing that you are doing to the people? Why do you act alone, while all the people stand about you from morning until evening?”(15) Moses replied to his father-in-law, “It is because the people come to me to inquire of God.(16) When they have a dispute, it comes before me, and I decide between one party and another, and I make known the laws and teachings of God.”(17) But Moses’ father-in-law said to him, “The thing you are doing is not right;(18) you will surely wear yourself out, and these people as well. For the task is too heavy for you; you cannot do it alone.(19) Now listen to me. I will give you counsel, and God be with you! You represent the people before God: you bring the disputes before God,(20) and enjoin upon them the laws and the teachings, and make known to them the way they are to go and the practices they are to follow.(21) You shall also seek out, from among all the people, capable individuals who fear God—trustworthy ones who spurn ill-gotten gain. Set these over them as chiefs of thousands, hundreds, fifties, and tens, and(22) let them judge the people at all times. Have them bring every major dispute to you, but let them decide every minor dispute themselves. Make it easier for yourself by letting them share the burden with you.

(Devarim 1:12) "How can I bear alone your contentiousness" — whence we are taught that they were contentious. If one of them saw his neighbor getting the better of him in judgment, he would say: I have witnesses to bring, I have proofs; tomorrow I will add accusers against you! — thus, "your contentiousness."

"and your heresy" — whence we are taught that they were "heretics" (against Moses). If Moses left his house (hurriedly to meet them), they would say: Why did the son of Amram leave (so hurriedly)? He is probably not at ease at home. If he was late to leave, they would say: Why isn't the son of Amram leaving? What do you think? He is plotting against you with his wife, as Korach did with his wife! — thus, "and your heresy."

"and your caviling": They were grumblers.

YOUR CUMBRANCE. Torchakhem (your cumbrance) is related to the word torach (burden) in They are a burden unto me (Is. 1:14). Your cumbrance refers to teaching the commandments to the simple.

AND YOUR BURDEN. They demanded bread, water, and meat. Compare, that Thou layest the burden of all this people upon me (Num. 11:11).

AND YOUR STRIFE. One with another.

טרחכם, your petty arguments which did not even involve financial claims.

ומשאכם, your bicckering involving the provision of the needs for the many.

וריבכם, and your mutual financial claims upon one another...