And he was told to reform himself and to take care of himself, but despite that he wasted his wealth, so the ruler will prevent him from spending. Because the Prophet ( صلی اللہ علیہ وسلم ) forbade the wasting of wealth. And the Prophet ( صلی اللہ علیہ وسلم ) said to the person who used to be deceived in buying and selling, "When you buy or sell, say: 'There is to be no deception.'" The Messenger of Allah ( صلی اللہ علیہ وسلم ) did not take his wealth into his own possession.

Narrated Ibn `Umar: A man was often cheated in buying. The Prophet said to him, "When you buy something, say (to the seller), No cheating." The man used to say so thenceforward .

Narrated Jabir: A man manumitted a slave and he had no other property than that, so the Prophet canceled the manumission (and sold the slave for him). Nu'aim bin Al-Nahham bought the slave from him.