Deuteronomy 16:16-20

16“Three times a year all your males shall appear before the Lord your God in the place which He chooses: at the Feast of Unleavened Bread, at the Feast of Weeks, and at the Feast of Tabernacles; and they shall not appear before the Lord empty-handed.

17Every man shall give as he is able, according to the blessing of the Lord your God which He has given you.

18“You shall appoint judges and officers in all your gates, which the Lord your God gives you, according to your tribes, and they shall judge the people with just judgment.

19You shall not pervert justice; you shall not show partiality, nor take a bribe, for a bribe blinds the eyes of the wise and twists the words of the righteous.

20You shall follow what is altogether just, that you may live and inherit the land which the Lord your God is giving you.