ALLAH Says in Holy Quran
Surely Allah does not forgive that a partner be ascribed to Him, although He forgives any other sins for whomever He wills. He who associates anyone with Allah in His divinity has indeed forged a mighty lie and committed an awesome sin. (04:48)
Beloved Prophet Muhammad (May ALLAH Peace and Mercy upon him) said in a Hadith:
Hazrat Abdullah bin Mas