What is the ruling on benefiting from the milk of a cow purchased with a usurious loan? Is drinking its milk considered consuming ill-gotten gains? Is it permissible to dispose of its price if it is sold? What should the father do to rid himself of the sin of usury? Is it permissible for the children to help in feeding it?

The answer is summarized in two points: First, the ownership of the cow is valid, and the loan, after its receipt, becomes the borrower's liability. It is permissible to benefit from the cow's produce, and its rights must be upheld. Second, the father must offer sincere repentance, regretting his actions and resolving not to return to usurious loans, and he must return the principal amount without interest if he is able.