When Jibreel first recited a part of the Qur’aan to the Prophet (ﷺ), the Prophet (ﷺ) tried to repeat it after him, word for word. Allaah later had Jibreel tell him not to do so. He was told instead to listen to the Qur’aan carefully. When the Prophet (r) did that, Allaah caused him to be able to remember everything without any effort on his part. Allaah said in the Qur’aan,

It was very important that the Prophet (r) remember all that was revealed to him, because he could neither read nor write.

The Prophet (ﷺ) passed on all of the Qur’aan to his companions before he died. He used a number of different ways to make sure that they memorized and recorded it exactly as he learned it.

1. The Prophet (ﷺ) used to recite aloud various parts of the Qur’aan in the salaahs (congregational prayers). In that way, his followers used to hear parts of the Qur’aan daily.69

2. Everyone who entered Islaam would be taught parts of the Qur’aan that they would have to use in their daily prayers. Thus, Muslims were always learning or teaching various parts of the Qur’aan.

3. The Prophet (ﷺ) informed his followers that the best of them were those who learned and taught the Qur’aan. This encouraged them to make even greater efforts to memorize the Qur’aan and teach it to others.

4. Those who were able to read and write were told by the Prophet (ﷺ) to write down the various sections of the Qur’aan as they were revealed. The Prophet (ﷺ) would tell them the order in which they should record the verses. Al-Baraa’ ibn ‘Aazib stated that when the verse, “Those believers who sit (at home) are not equal with those who strive,” was revealed, the Prophet (ﷺ) said, “Call So-and-so.” He came with an inkpot and a wooden board or a shoulder blade. The Prophet (ﷺ) said, “Write: ‘Those believers who sit (at home) are not equal with those who strive in the cause of Allaah...’ ”70

Because there was no paper in Arabia at that time, the Qur’aan was written down on anything that was available. The companions wrote the verses of the Qur’aan on date palm leaves, flat stones, tree bark, wood, dried animal skins, and even the shoulder blades of sheep or camels. Thus, the verses of the Qur’aan were preserved in the hearts of Muslims, as well as written down, during the lifetime of the Prophet (ﷺ). Since people entered Islaam at various points during the Prophet’s mission, only a few of them heard all of the Qur’aan directly from the Prophet (ﷺ). Some companions were able to memorize better than others. So, even though all of them memorized portions of the Qur’aan, only a few were able to memorize all of the Qur’aan during the Prophet’s lifetime. on date palm leaves, flat stones, tree bark, wood, dried animal skins, and even the shoulder blades of sheep or camels. Thus, the verses of the Qur’aan were preserved in the hearts of Muslims, as well as written down, during the lifetime of the Prophet (ﷺ). Since people entered Islaam at various points during the Prophet’s mission, only a few of them heard all of the Qur’aan directly from the Prophet (ﷺ). Some companions were able to memorize better than others. So, even though all of them memorized portions of the Qur’aan, only a few were able to memorize all of the Qur’aan during the Prophet’s lifetime.

When the Prophet (ﷺ) died in the year 632 CE, the whole of the Qur’aan was not written down in one complete book. It was recorded on various pieces of writing material and kept in the possession of different followers of the Prophet (ﷺ). Each had sections, but none of them had all of it. Because of the fact that the verses of the Qur’aan continued to be revealed up until a few months before the Prophet’s death, the companions were more concerned with recording and memorizing than putting it all together in one book. Consequently, the gathering of the Qur’aan into one text was not done during the lifetime of the Prophet (ﷺ).