Sahih al-Bukhari 3428
صحيح البخاري#3428SahihNarrated `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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 60:99