Exodus 18:17 in the King James Version
And Moses’ father in law said unto him, The thing that thou doest is not good.
Context
16 When they have a matter, they come to me, and I judge between a man and his neighbor, and I make them know the statutes of God, and his laws.”
17 Moses’ father-in-law said to him, “The thing that you do is not good.
18 You will surely wear away, both you, and this people that is with you; for the thing is too heavy for you. You are not able to perform it yourself alone.