An-Nisa 4:48

Inna Allaha la yaghfiru anyushraka bihi wayaghfiru ma doona thalika limanyashao waman yushrik billahi faqadi iftaraithman AAatheema

Indeed, Allāh does not forgive association with Him, but He forgives what is less than that for whom He wills. And he who associates others with Allāh has certainly fabricated a tremendous sin.

Surely, Allah does not forgive that a partner is ascribed to Him, and He forgives anything short of that for whomsoever He wills. Whoever ascribes a partner to Allah commits a terrible sin.