"It is those who believe (in the Oneness of Allah and worship none but Him Alone) and confuse not their belief with Zuim (wrong i.e., by worshipping others besides Allah).. ." (V.6:82)
Narrated `Abdullah:When:"...and confuse not their belief with wrong." (6.82) was revealed, the Prophet's companions said, "Which of us has not done wrong?" Then there was revealed:-- "Verily joining others in worship with Allah is a tremendous wrong indeed." (31.13)
Reference
Sahih al-Bukhari 4629
In-book reference
Book 65, Hadith 151
USC-MSA web (English)
Vol. 6, Book 60, Hadith 153
Translation by Dr. M. Muhsin Khan · Language: EN
Sahih
Arabic Text
حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ شُعْبَةَ، عَنْ سُلَيْمَانَ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ لَمَّا نَزَلَتْ {وَلَمْ يَلْبِسُوا إِيمَانَهُمْ بِظُلْمٍ} قَالَ أَصْحَابُهُ وَأَيُّنَا لَمْ يَظْلِمْ فَنَزَلَتْ {إِنَّ الشِّرْكَ لَظُلْمٌ عَظِيمٌ}