سورة النساء

إِنَّ اللَّهَ لَا يَغْفِرُ أَنْ يُشْرَكَ بِهِ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَنْ يَشَاءُ ۚ وَمَنْ يُشْرِكْ بِاللَّهِ فَقَدِ افْتَرَىٰ إِثْمًا عَظِيمًا ﴿٤٨﴾

Surah an-Nisa'

48. Allah does not forgive associating with Him, but He forgives anything less than that to whomever He wills. Whoever associates others with Allah has devised a monstrous sin.