Virtues of the Qur'an
Bukhari :: Book 6 :: Volume 61 :: Hadith 522
Narrated Shaqiq bin Salama:
Once 'Abdullah bin Mas'ud delivered a sermon before us and said, "By Allah, I learnt over seventy Suras direct from Allah's Apostle . By Allah, the companions of the Prophet came to know that I am one of those who know Allah's Book best of all of them, yet I am not the best of them." Shaqiq added: I sat in his religious gathering and I did not hear anybody opposing him (in his speech).
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