Exodus 18:22-26

22 And let them judge the people at all seasons: and it shall be, that every great matter they shall bring to you, but every small matter they shall judge: so shall it be easier for yourself, and they shall bear the burden with you.

23 If you shall do this thing, and God command you so, then you shall be able to endure, and all this people shall also go to their place in peace.

24 So Moses listened to the voice of his father in law, and did all that he had said.

25 And Moses chose able men out of all Israel, and made them heads over the people, rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens.

26 And they judged the people at all seasons: the hard causes they brought to Moses, but every small matter they judged themselves.