Greetings Dr. Zakir Naik. Its known that Muhammad (pbuh) was the most righteous human being on earth. Who will be the most unrighteous ? Reply me as soon as possible. Its urgent!

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His Slave and Messenger.

The most wicked of all creation is Iblees (Satan) who refused to obey the command of Allaah and indulged in his own pride and was one of the unbelievers. Therefore, Allaah cursed him, warned us against him, and commanded us to take him as enemy. Allaah, The Exalted, says (what means): {Indeed, Satan is an enemy to you; so take him as an enemy. He only invites his party to be among the companions of the Blaze.}[Quran 35:6]

Allaah Knows best.