Exodus 4:21

4:21 The Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the wonders I have put under your control. But I will harden his heart and he will not let the people go.

Exodus 18:22

18:22 They will judge the people under normal circumstances, and every difficult case they will bring to you, but every small case they themselves will judge, so that you may make it easier for yourself, and they will bear the burden with you.