פְּתַח־פִּ֥יךָ שְׁפָט־צֶ֑דֶק וְ֝דִ֗ין עָנִ֥י וְאֶבְיֽוֹן׃ (פ)
Bukalah mulutmu, hakimilah dengan adil, dan belalah perkara orang yang tertindas dan orang yang miskin.
Or HaChaim
Perhaps Moses also wanted to hint at something we have learned in Talmud Jerushalmi Sanhedrin 3,8. We are told there that when Rav Hunna watched litigation and observed that one of the defendants did not argue a point in his favour which he could have argued (out of ignorance) he interfered in the proceedings and drew the defendant's attention to an argument he should use. He based himself on Proverbs 31,9: "open your mouth, speak righteously." This is precisely what Moses may have alluded to when he said לאמור, "to say." No steps must be neglected if they help to establish true and fair judgment.