Midrash su Isaia 1:22

R. Jochanan said: "What does the passage (Ruth 1, 1) And it came to pass in the days when the judges judged, mean? It was a generation that judged its judges. If the judge said to a person: 'Remove the mote from thy eye,' he answered: 'Take the beam out of thine own eyes.' If the judge said to one: 'Thy silver is become dross,' the answer was: (Is. 1, 32) Thy wine is drugged with water." (Job 1, 6-9) Now it happened … .that the accuser (Satan) also came in the midst of them, etc. Thus said Satan before the Holy One, praised be He! "Sovereign of the Universe! I have sped all over the world and found no trusty man like thy servant Abraham, to whom thou dost say (Gen. 13, 17) Arise, wall: through the land in the length of it and in the breadth of it, for unto thee will I give it. And notwithstanding this, when he searched for a grave to bury his wife Sarah, and did not find one until he bought it for four hundred silver shekels, he did not murmur or bear anything against Thee." Then said the Lord to Satan: "Hast thou directed thy attention toward My servant Job, for there is none like him . . and shunned evil. What does shunned evil, mean? R. Aba b. Samuel said: "Job was liberal with his money; the custom of the world is if a laborer has done some service to the value of a P'ruta that the employer [takes him to the storekeeper] buys something for this coin, and gives the laborer one-half of what is due him. Job, however, gave him the whole coin for such services. R. Jochanan remarked: "That which was said concerning Job is more important than that which was said concerning Abraham, for regarding Abraham it is written (Gen. 22, 12) Now I know that thou fearest God, etc. And regarding Job it is written (Job. 1, 1) And that man was whole-heearted and upright, and one that feared God and shunned evil."

There were men in Jerusalem, also, who loaned money on interest, as it is said: Thy silver is become dross (Isa. 1:22). What was their fate? Refuse silver shall men call them, because the Lord hath rejected them (Jer. 6:30). Therefore Scripture states: Thy silver is become dross, It is also written: They shall cast their silver and their gold into the streets (Ezek. 7:19). Why? Because they had transgressed the law, as it is said: Thou shalt not give him thy money upon interest (Lev. 25:37).