Envy leads to animosity, evil thinking about others' intentions, backbiting, spreading rumors, lying, turning back on each other's, parting with bad terms, it may also lead the envious person to inflict physical damage to the envied person may Allah forbid. It is a bad seed for a terrible tree of diseases.
For this reason, the scholars consider it from among the most dangerous, destructive, inner diseases, and the most destructive for deen and worldly life. The Islamic ruling of envy is haram (prohibited); the degree of prohibition differs depending on the sins that result from it.
For this reason, the messenger of Allah (S.A.W.) forbade us in the authentic hadeeth that is reported by Imams Bukhari and Muslim, "Do not envy one another and do not hate one another, and do not turn your back on one another (in discontent) and be the servants of Allah like brothers."