Exodus 18:15, 19, 26
Exodus 18:15 ESV
And Moses said to his father-in-law, “Because the people come to me to inquire of God
Exodus 18:19 ESV
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
Exodus 18:26 ESV
And they judged the people at all times. Any hard case they brought to Moses, but any small matter they decided themselves.