Chapter 5: Was the Qur’an collected into one book under Muhammad’s supervision?
No. The following hadith shows that before Muhammad died he had not collect the words of the Qur’an into one authorised book, nor had he commanded this to be done. It was his companions who decided to do this. They gathered together material from various sources and made their own collections.

Sahih Al Bukhari Vol 6 No. 509: Bk 66.8
https://sunnah.com/bukhari:4986
Narrated Zaid bin Thabit: Abu Bakr As−Siddiq sent for me when the...

Sahih Al Bukhari Bk 56 No. 250
https://sunnah.com/bukhari:3044
Narrated Anas bin Malik (ra): Allah's Messenger entered (Makkah) in the year of the Conquest (of Makkah) wearing a helmet over his head. After he took it off, a man came and said, "Ibn Khatal is clinging to the curtains of the Ka'bah." The Prophet said, "Kill him."

Grade    : Sahih (Al-Albani)      صحيح   (الألباني)     حكم     :
Reference     : Sunan Abi Dawud 4359
https://sunnah....

Sahih Muslim Bk 21, Number 4757: Bk 34.28
https://sunnah.com/muslim:1935b
Jabir b. 'Abdullah reported: Allah's Messenger (may peace he upon him) sent us (on an expedition). We were three hundred riders and our chief (leader) was 'Ubaida b. al−Jarrah. We were on the look out for a caravan of the Quraish. So we stayed on the coast for half a month, and were so much afflicted by extreme hunger that we (were obliged) to eat leaves. That is why it was called the Detachment of the Leaves. The ocean cast out for us an animal...

https://islamqa.info/en/answers/811

Narrated `Ali:
I heard the Prophet (ﷺ) saying, "In the last days (of the world) there will appear young people with foolish thoughts and ideas. They will give good talks, but they will go out of Islam as an arrow goes out of its game, their faith will not exceed their throats. So, wherever you find them, kill them, for there will be a reward for their killers on the Day of Resurrection."
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا سُفْيَانُ، حَدَّثَنَا الأَعْمَشُ، عَنْ...