The Eight rules of Muslim Interaction given by the Prophet Muhammad In an amazing narration of the Prophet Muhammad, he outlines a series of rules that every Muslim should uphold in their relationships. The Messenger of Allah (ﷺ) said:
Do not envy one another, do not inflate prices for one another, and do not hate one another, and do not turn away from one another. And do not undercut one another in trade, but [rather] be slaves of Allah, be brothers [amongst yourselves]. A Muslim is the brother of a Muslim: he does not oppress him, nor does he fail him, nor does he lie to him, nor does he hold him in contempt. Taqwa (piety) is right here [and he pointed to his chest three times]. It is evil enough for a man to hold his brother Muslim in contempt. The whole of a Muslim is inviolable for another Muslim: his blood, his property, and his honour. [Muslim]