Sahih al-Bukhari 3428
Narrated `Abdullah:
When the Verse:-- 'Those who believe and mix not their belief with wrong." was revealed, the 
companions of the Prophet (ﷺ) said, "Who amongst us has not mixed his belief with wrong?" Then Allah 
revealed: "Join none in worship with Allah, Verily joining others in worship with Allah is a great 
wrong indeed."
حَدَّثَنَا أَبُو الْوَلِيدِ، حَدَّثَنَا شُعْبَةُ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ لَمَّا نَزَلَتِ ‏{‏الَّذِينَ آمَنُوا وَلَمْ يَلْبِسُوا إِيمَانَهُمْ بِظُلْمٍ‏}‏ قَالَ أَصْحَابُ النَّبِيِّ صلى الله عليه وسلم أَيُّنَا لَمْ يَلْبِسْ إِيمَانَهُ بِظُلْمٍ فَنَزَلَتْ ‏{‏لاَ تُشْرِكْ بِاللَّهِ إِنَّ الشِّرْكَ لَظُلْمٌ عَظِيمٌ ‏}‏