Midrash su Isaia 33:1

What is written about one who takes interest? He that hath given forth upon interest, and hath taken increase; shall he then live? He shall not live (Exod. 18:13). This may be compared to a king who makes his treasures available to a certain individual who later begins to oppress the poor, kill the widows, embarrass the needy, despoil the naked, do violence and theft, indulge in falsehood, and squander the king’s treasures. Similarly, the Holy One, blessed be He, opens His treasure to the wealthy, with all that He possesses in it, as it is said: Mine is the silver, and Mine the gold (Hag. 2:8). Then the rich man begins to loan money on interest. And he starts to taunt the widows and oppress them with interest, to embarrass the poor, and to humiliate the naked who seek charity from him, even though the Holy One, blessed be He, had declared: Whoso mocketh the poor blasphemeth his Maker (Prov. 17:5). If a man’s neighbor is in debt to him for a hundred zuzim, he beats him, strips him, does violence to him, steals from him, and destroys the pledges he entrusted to him. Then the Holy One, blessed be He, says: Woe to thee that spoilest, and thou was not spoiled; and dealest treacherously, and they dealt not treacherously with thee! When thou hast ceased to spoil, thou shalt be spoiled (Isa. 33:1). The Holy One, blessed be He, gave him wealth from His treasure house, which was a treasure house of truth, and he made it into a treasure house of falsehood, as it is said: Ye have plowed wickedness, ye have reaped iniquity, ye have eaten the fruit of lies, for thou didst trust (Hos. 10:13). Hence, when the whirlwind passeth, the wicked is not more (Prov. 10:25). And that is why Solomon proclaimed: Rob not the weak, because he is weak, neither crush the poor in the gate; for the Lord will plead their cause (ibid. 22:22).