Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 299
Narrated Abdullah:
When there was revealed: 'It is those who believe and confuse not their beliefs with wrong.' (6.82) It was very hard for the companions of Allah's Apostle, so they said, "Which of us has not confused his belief with wrong?" Allah's Apostle said, "The Verse does not mean this. Don't you hear Luqman's statement to his son: 'Verily! Joining others in worship, with Allah is a great wrong indeed.' (31.13)