Sahih al-Bukhari 32
Sahih al-Bukhari · Book 2: Belief · Dhulm (wrong) of one kind can be greater or lesser than that of another
Narrated 'Abdullah:
حَدَّثَنَا أَبُو الْوَلِيدِ ، قَالَ حَدَّثَنَا شُعْبَةُ ، ح. قَالَ وَحَدَّثَنِي بِشْرٌ ، قَالَ حَدَّثَنَا مُحَمَّدٌ ، عَنْ شُعْبَةَ ، عَنْ سُلَيْمَانَ ، عَنْ إِبْرَاهِيمَ ، عَنْ عَلْقَمَةَ ، عَنْ عَبْدِ اللَّهِ ، قَالَ لَمَّا نَزَلَتِ {الَّذِينَ آمَنُوا وَلَمْ يَلْبِسُوا إِيمَانَهُمْ بِظُلْمٍ} قَالَ أَصْحَابُ رَسُولِ اللَّهِ صلى الله عليه وسلم أَيُّنَا لَمْ يَظْلِمْ فَأَنْزَلَ اللَّهُ {إِنَّ الشِّرْكَ لَظُلْمٌ عَظِيمٌ} .
When the following Verse was revealed: "It is those who believe and confuse not their belief with wrong (worshipping others besides Allah.)" (6:83), the companions of Allah's Messenger (ﷺ) asked, "Who is amongst us who had not done injustice (wrong)?" Allah revealed: "No doubt, joining others in worship with Allah is a great injustice (wrong) indeed." (31.13)