Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) relates that the Messenger of Allah (peace and blessings be upon him) taught me to recite a Surah of "Ha Mim". Then I went to the mosque, and there I met a man from the people of the mosque. I asked him: "Do you recite this Surah?" He said: "Yes," and then he recited it in a way that I did not recite. I asked: "Who taught it to you?" He said: "The Messenger of Allah (peace and blessings be upon him)." I said: "The Messenger of Allah (peace and blessings be upon him) taught it to me as well." Then I met another man and asked him: "Do you recite this Surah?" He said: "Yes." I said: "Recite." And he was reciting just like my companion (the first man). I asked: "Who taught it to you?" He said: "The Prophet (peace and blessings be upon him)." I said: "And the Messenger of Allah (peace and blessings be upon him) taught it to me as well." Then I went to the Prophet (peace and blessings be upon him) while he (peace and blessings be upon him) was sitting, and I said: "This man has recited differently from me." His (peace and blessings be upon him) blessed face changed and he (peace and blessings be upon him) became angry; then he (peace and blessings be upon him) gestured towards Sayyiduna Ali (may Allah be pleased with him), who was present with him (peace and blessings be upon him), and the Messenger of Allah (peace and blessings be upon him) said something. Then Sayyiduna Ali (may Allah be pleased with him) said: "The Messenger of Allah (peace and blessings be upon him) commands that each man among you should recite as he has been taught, for those before you were destroyed only because of their disputes."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Khalid al-Dalani except Abd al-Salam bin Harb, whereas al-A'mash also narrated it from Asim."
And others besides al-A'mash also narrated it.
Hadith Referenceالمعجم الأوسط / باب الحاء / 3418
Hadith Takhrij«أخرجه البخاري فى «صحيحه» برقم: 2410، 3476، 5062، وابن حبان فى «صحيحه» برقم: 747، والحاكم فى «المستدرك» برقم: 2904، 2903، والنسائي فى «السنن الكبرى» برقم: 8040، وسعيد بن منصور فى «سننه» برقم: 35، وأحمد فى «مسنده» برقم: 3801، 3879، 3984، 3985، 4061، 4073، 4074، 4408، 4450، والطيالسي فى «مسنده» برقم: 387، وأبو يعلى فى «مسنده» برقم: 5057، 5262، 5341، وابن أبي شيبة فى «مصنفه» برقم: 30796»