Exodus 23:6-8:  Thou shalt not wrest the judgment of thy poor in his cause. Keep thee far from a false matter; and the innocent and righteous slay thou not: for I will not justify the wicked. And thou shalt take no gift: for the gift blindeth the wise, and perverteth the words of the righteous.

Deuteronomy 16:18-20: Judges and officers shalt thou make thee in all thy gates, which the LORD thy God giveth thee, throughout thy tribes: and they shall judge the people with just judgment. Thou shalt not wrest judgment; thou shalt not respect persons, neither take a gift: for a gift doth blind the eyes of the wise, and pervert the words of the righteous. That which is altogether just shalt thou follow, that thou mayest live, and inherit the land which the LORD thy God giveth thee.

Leviticus 19:15: Ye shall do no unrighteousness in judgment: thou shalt not respect the person of the poor, nor honour the person of the mighty: but in righteousness shalt thou judge thy neighbour.

Deuteronomy 24:17-18:  Thou shalt not pervert the judgment of the stranger, nor of the fatherless; nor take a widow's raiment to pledge: But thou shalt remember that thou wast a bondman in Egypt, and the LORD thy God redeemed thee thence: therefore I command thee to do this thing.