The ruling on a buyer damaging the reputation of the seller and his goods because the seller did not sell them to him

Question:
Shaykh Salih, also among the questions we received, this questioner, Abdullah, asks: Is it permissible for a person to disparage another person’s goods, to defame the merchandise, and to damage the reputation, simply because the seller refused to sell him that item? He went ahead and defamed the goods and this livestock.

Answer:
It is not permissible to encroach upon the rights of people or to harm them, and it is not permissible to corrupt their wealth, defame it, or create defects in it. This is forbidden and constitutes an encroachment upon them, and it involves a great sin and injustice toward people. People are free in their wealth within the limits of the Shari'ah. If he prevented you from buying it, he has the right to do so, so do not take revenge on him for that reason; this is his right. Yes.