Moses
Deuteronomy 17:8ESV·traditional attribution

“If any case arises requiring decision between one kind of homicide and another, one kind of legal right and another, or one kind of assault and another, any case within your towns that is too difficult for you, then you shall arise and go up to the place that the LORD your God will choose.

John Calvin Reformed @genevareformer

8 If there arise a matter too hard for thee. The principal office of the priests is here described under a single head, viz., that they should declare what was right in doubtful and obscure matters out of the Law of God; for although God seems only to refer to civil controversies, yet there is no doubt but that by synecdoche He appoints them to...

Matthew Henry Presbyterian @wholebiblehenry

Courts of judgment were ordered to be erected in every city (Deu 16:18), and they were empowered to hear and determine causes according to law, both those which we call pleas of the crown and those between party and party; and we may suppose that ordinarily they ended the matters that were brought before them, and their sentence was definitive; but, 1.

Commenting on Deuteronomy 17:8-13

John Gill Reformed Baptist @doctorgill

If there arise a matter too hard for thee in judgment,.... This is spoken to inferior judges in cities in the country, who sometimes might have cases too wonderful and mysterious, as the word signifies, or secret and hidden, such as were out of their reach and beyond their capacity, and so be very difficult for them to determine what should be done: between blood...