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)

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)