Deuteronomy 16:19,20

Thou shalt not wrest judgment Not give a forced and unjust sentence. Thou shalt not respect persons Not give sentence according to the quality of the person, his riches or poverty, friendship or enmity, but according to the justice of the cause. A gift doth blind the eyes of the wise Biases his mind, that he cannot discern between right and wrong. And pervert the words of the righteous That is, the sentence of those judges who are inclined and used to do righteous things, and have the reputation of being righteous men; it makes them give a wrong judgment. That which is altogether just Hebrew, righteousness, righteousness, doubling the expression to give it emphasis; that is, nothing but righteousness in all causes and times, and to all persons equally.