Exodus 18:15; Exodus 18:19; Exodus 18:26

15 And Moses said to his father-in-law, "Because the people come to me to inquire of God;

19 Now obey my voice; I will give you advice, and God be with you! You shall represent the people before God and bring their cases to God,

26 And they judged the people at all times. Any hard case they brought to Moses, but any small matter they decided themselves.