When the Verse:--'Those who believe and did not confuse their belief with wrong (worshipping others besides Allah).' (6.82) was revealed, it was hard on the companions of the Prophet (ﷺ) and they said, "Who among us has not wronged (oppressed) himself?" Allah's Messenger (ﷺ) said, "The meaning of the Verse is not as you think, but it is as Luqman said to his son, 'O my son! Join not in worship others with Allah, Verily! Joining others in worship with Allah is a great wrong indeed.'" (31.13)
Sahih al-Bukhari Book 88, Hadith 19
← Previous Hadith I heard Hisham bin Al-Hakim reciting Surat Al-Furqan during the lifetime of Allah's Messenger (ﷺ). I listened to his recitation and noticed that he recited it in several different ways which Allah's Messenger (ﷺ) had not taught me. So I was about to jump over him during his Salat (prayer) but I waited till he finished his Salat (prayer) whereupon I put, either his upper garment or my upper garment around his neck and seized him by it and asked him, "Who has taught you this Surah?" He replied: "Allah's Messenger (ﷺ) has taught it to me." I said (to him), "You have told a lie! By Allah, Allah's Messenger (ﷺ) has taught me this Surah which I have heard you reciting." So I dragged him to the Allah's Messenger (ﷺ). I said: "O Allah's Messenger I have heard this man reciting Surat Al-Furqan in a way in which you have not taught me, and you did teach me Surah Al-Furqan." On that Allah's Messenger (ﷺ) said, "O 'Umar, release him! Recite, O Hisham". So Hisham recited before him in the way as I heard him reciting. Allah's Messenger (ﷺ) said, "It has been revealed like this." Then Allah's Messenger (ﷺ) said, "Recite, O 'Umar" So recited it. The Prophet (ﷺ) said, "It has been revealed like this." And then he added, "This Qur'an has been revealed to be recited in seven different ways, so recite it whichever way is easier for you."

Sahih al-Bukhari Book 88, Hadith 18 Next Hadith → Once Allah's Messenger (ﷺ) came to me in the morning, and a man among us said, "Where is Malik bin Ad- Dukhshun?" Another man from us replied, "He is a hypocrite who does not love Allah and His Apostle." The Prophet (ﷺ) said, "Don't you think that he says: None has the right to be worshipped but Allah, only for Allah's sake?" They replied, "Yes" The Prophet (ﷺ) said, "Nobody will meet Allah with that saying on the Day of Resurrection, but Allah will save him from the Fire."

Sahih al-Bukhari Book 88, Hadith 20