Deuteronomy 17:5-9

then you are to bring out to your gates that man or woman who has done this evil deed, that is, the man or the woman, and you shall stone them to death.

On the testimony of two witnesses or three witnesses, the condemned shall be put to death; he shall not be put to death on the testimony of only one witness.

The hands of the witnesses shall be first against him to put him to death, and afterward the hands of all the people. So you shall eliminate the evil from your midst.

“If a case is too difficult for you to decide, between one kind of homicide or another, between one kind of lawsuit or another, and between one kind of assault or another, that are cases of dispute in your courts, then you shall arise and go up to the place which the Lord your God chooses.

So you shall come to the Levitical priests or the judge who is in office in those days, and you shall inquire of them and they will declare to you the verdict.