Sayyiduna Umar (may Allah be pleased with him) narrates that once I heard Sayyiduna Hisham bin Hakim bin Hizam (may Allah be pleased with him) reciting Surah Al-Furqan. He recited some words in it which the Prophet (peace and blessings of Allah be upon him) had not taught me. At that time, I was performing prayer, and I wished to question him right there in the prayer. However, after finishing, I asked him, "Who taught you to recite Surah Al-Furqan in this way?" He replied, "The Prophet (peace and blessings of Allah be upon him) did." I said, "You are lying! By Allah, the Prophet (peace and blessings of Allah be upon him) did not teach you this Surah in this manner." Saying this, I took hold of his hand and dragged him to the Prophet (peace and blessings of Allah be upon him) and said, "O Messenger of Allah! You yourself taught me Surah Al-Furqan, and I have heard him reciting it in words which you did not teach me?" The Prophet (peace and blessings of Allah be upon him) told Hisham to recite it. He recited it in the same way as before. The Prophet (peace and blessings of Allah be upon him) said, "This Surah was revealed in this way." Then he said to me, "Umar, you also recite." So I recited it. The Prophet (peace and blessings of Allah be upon him) said, "This Surah was also revealed in this way." Then he said, "Indeed, this Qur'an has been revealed upon seven modes of recitation."