Midrash su Deuteronomio 25:13

Rabbi asked Rabbi Betzalel: What is that which is written: “For their mother has committed harlotry” (Hosea 2:7)? Is it possible that Sarah our matriarch was a harlot? He said to him: ‘Heaven forbid; rather, when are matters of Torah rendered contemptible before the common people? It is when their owners debase them.’ Rabbi Yaakov bar Avdimi came and rendered it a [midrashic] dictum: When do matters of Torah become like harlots before the common people? When their owners debase them. Rabbi Yoḥanan derives it from here: “The poor man’s [misken] wisdom is contemptible” (Ecclesiastes 9:16). Was the wisdom of Rabbi Akiva, who was poor, contemptible? Rather, what is a misken? It is one who is contemptible in his words, like an elder who sits and teaches: “You shall not pervert justice” (Deuteronomy 16:19), and he perverts justice; “you shall not show partiality” (Deuteronomy 16:19), and he shows partiality; “you shall not afflict any widow or orphan” (Exodus 22:21) and he afflicts them. Samson followed his eyes, as it is stated: “Take her for me, as she is fitting in my eyes” (Judges 14:3). Gideon worshipped idols, as it is stated: “Gideon made it into an ephod” (Judges 8:27). Woe to a judge who shows partiality in judgment.
Rabbi Ḥiyya taught: “You shall not do injustice in judgment” (Leviticus 19:15) – this teaches that a judge who corrupts judgment is called by five names: unjust, hated, detestable, proscribed, abomination. The Holy One blessed be He calls him five: wicked, blasphemer, violator of the covenant, one who infuriates, and defiant. He causes five results in the world; he defiles the land, desecrates the Name, expels the Divine Presence, causes Israel to fall by the sword, and exiles them from their land. Woe to the generation that is corrupted in this way.
Rabbi Ḥiyya taught: “You shall not do injustice in judgment [in measure, in weight, or in volume]” (Leviticus 19:35) – in a judicial ruling. If it is about judicial rulings, it is already stated about judicial rulings!³⁵In the verse cited above, Leviticus 19:15: “You shall not do injustice in judgment.” If so, why is it stated, “…in judgment in measure [in weight, or in volume]”? It teaches that one who measures is called a judge, and if he falsifies, he is called five names and he causes five results. Woe is the generation whose measures are false, as Rabbi Benaya said in the name of Rabbi Huna: If you see a generation whose measures are false, a kingdom comes and besets that generation. What is the reason? “Scales of deceit are an abomination to the Lord” (Proverbs 11:1), and it is written: “Pride comes, shame comes” (Proverbs 11:2).
Rabbi Berekhya said in the name of Rabbi Abba: It is written: “Will I find merit with scales of wickedness, [or with a pouch of deceitful weights?]” (Micah 6:11). Is it possible that a generation whose measures are false will find merit? Rather, “in a pouch of deceitful weights.”³⁶They will be left with a purse filled with counterfeit coins. The midrash is reading the second half of the verse, “or with a pouch of deceitful weights” not as the continuation of the rhetorical question, but as the answer to “Will I find merit with scales of wickedness?” Rabbi Levi said: Moses indeed alluded this to Israel in the Torah: “You shall not have in your purse [alternate weights]” (Deuteronomy 25:13); “you shall not have in your house alternate measures” (Deuteronomy 25:13), and if he did so, ultimately, a kingdom will come and beset them, as it is written: “As it is an abomination to the Lord anyone who does [oseh] so, anyone who does [oseh] injustice” (Deuteronomy 25:16), and it is written: “Remember what Amalek did [asah] to you, on the way, as you were leaving Egypt” (Deuteronomy 25:17).

Rabbi said: Blessings³⁷In the sense of good deeds. bring blessings upon their purveyors; curses³⁸In the sense of evil deeds. bring curses upon their purveyors. Blessings bring blessings upon their purveyors, as it is written: “A whole and just weight shall be [yours]” (Deuteronomy 25:15), and if you do so: “shall be yours” (Deuteronomy 25:15). Curses bring curses upon their purveyors, as it is written: “You shall not have in your purse different weights, large and small” (Deuteronomy 25:13), and if you do so, the Holy One blessed be He said: ‘You sought to use large and small? By your life, that wicked one [who uses corrupt weights] will not manage to possess even something small,’ as it is written: “You shall not have in your purse.” Similarly, “you shall not make with Me [gods of silver and gods of gold]” (Exodus 20:20). The Holy One blessed be He said: ‘You sought to make for Me “gods of silver and gods of gold” – by your life, that wicked one will not manage to make even one of wood,’ as it is written: “You shall not make for yourselves” (Exodus 20:20).

Our Rabbis were taught (Deut. 25) Thou shalt not have. Infer from this that weight and measure commissioners should be appointed for superintending the markets, but not for fixing prices. The Exilarchs once appointed commissioners for both measures and prices, whereupon Samuel said to Karna: "Go and lecture to them that commissioners should be appointed only for measures but not for fixing prices." He, however, lectured that commissioners should be appointed for both to superintend measures and to fix prices. Samuel thereupon cursed him for this. But Karna did it in accordance with Rami b. Chama, who said in the name of R. Isaac: "Men should be appointed to superintend measures as well as to fix prices, because of swindlers."