Mishnah 8 - Chapter 1 - Pirkei Avot

Yehudah ven tabba veshim'on ben shatach kibbelu mehem. Yehudah ben tabba omer, al ta'as atzmecha ke'orechei haddayanin. Uchesheyihyu ba'alei dinin omedim lefaneicha, yihyu ve'eineicha kirsha'im. Ucheshenniftarim millefaneicha, yihyu ve'einecha kezakka'in, keshekkibbelu aleihem et haddin.

Judah ben Tabbai and Shimon ben Shetach received [the oral tradition] from them. Judah ben Tabbai said: do not [as a judge] play the part of an advocate; and when the litigants are standing before you, look upon them as if they were [both] guilty; and when they leave your presence, look upon them as if they were [both] innocent, when they have accepted the judgement.

Yehudah ben Tabbai and Shimon ben Shetach received it from them. Yehudah ben Tabbai says: Do not you, [(a judge)], make yourself like [those] orchei hadayanim [(lawyers), who arrange ("orchim") cases for the litigants before the judges, it being forbidden for one (a judge) to reveal his judgments to one of the litigants, telling him: Do thus and thus so that you win your case — even if he knows that he is in the right. Alternately, "ke'orchei hadayanin," like the great among the judges. This, in reference to a disciple sitting before his master, that he not make himself like the great among the judges, to speak before his master as a decisor of the law. "Orchei" as in "the erkaoth of the gentiles," the erkaoth of the House of David." And from others I have heard: "Do not make yourself as the great ones of the judges to force the litigants to come to judgment before you.] And when litigants stand before you, let them be in your eyes like wicked ones, [that you not favor one of them, saying "This one is a distinguished man and will not make a false claim." For if you say this, you will see no guilt in him.], and when they take their leave of you, let them be innocent in your eyes when they have taken the judgment upon themselves. [Do not suspect the arraigned one as a thief but as one who erred and had no intention of stealing. Or, if an oath was imposed upon one of them and he swore, do not say that he swore falsely.]