Number 2 : abdullah bin abi al-sarah apostasy and writing al Quran
Muhammad had scribes write his revelations down for him. One scribe was `Abdullah Ibn Sa'd Ibn Abi Sarh. As Sarh wrote these revelations down, he frequently made suggestions on improving their wording. Muhammad often agreed and allowed the changes to be made. Eventually, Sarh left Islam, knowing it could not be from God if a mere scribe were allowed to change God's word. Later, after the conquest of Mecca, Muhammad ordered Sarh's death.
Al-Sira by al-'Iraqi :
"The scribes of Muhammad were 42 in number. Abdallah Ibn Sarh al-Amiri was one of them, and he was the first Quraishite among those who wrote in Mecca before he turned away from Islam. He started saying, "I used to direct Muhammad wherever I willed. He would dictate to me 'Most High, All-Wise', and I would write down 'All-Wise' only. Then he would say, 'Yes it is all the same'. On a certain occasion he said, 'Write such and such', but I wrote 'Write' only, and he said, 'Write whatever you like.'" So when this scribe exposed Muhammad, he wrote in the Qur'an, "And who does greater evil than he who forges against God a lie, or says, 'To me it has been revealed', when naught has been revealed to him." (6:93) So on the day Muhammad conquered Mecca, he commanded his scribe to be killed. But the scribe fled to Uthman Ibn Affan, because Uthman was his foster brother (his mother suckled Uthman). Uthman, therefore, kept him away from Muhammad. After the people calmed down, Uthman brought the scribe to Muhammad and sought protection for him. Muhammad kept silent for a long time, after which he said yes. When Uthman had left, Muhammad said "I only kept silent so that you (the people) should kill him."
Al-Baidawi commenting on the Qur'an, Sura al-Anam 6:93:
"'To me it has been revealed', when naught has been revealed to him" refers to Abdallah Ibn Sad Ibn Abi Sarh, who used to write for God's messenger. The verse (23:12) that says, "We created man of an extraction of clay" was revealed, and when Muhammad reached the part that says, "... thereafter We produced him as another creature (23:14), Abdallah said, "So blessed be God the fairest of creators!" in amazement at the details of man's creation. The prophet said, "Write it down; for thus it has been revealed." Abdallah doubted and said, "If Muhammad is truthful then I receive the revelation as much as he does, and if he is a liar, what I said is a good as what he said."kindly check the links bellow as part of the sites i got my info from beside others https://www.youtube.com/watch?v=N-W0vdUkiSEhttps://www.youtube.com/watch?v=tBpbUnZ7IFYhttps://www.reddit.com/r/exmuslim/comments/3c39j4/the_quran_contains_words_by_abdullah_ibn_sad_ibn/?st=j0xub9wz&sh=1aa707aahttp://abdullahsameer.com/blog/en/abdullah-ibn-abi-sarh/https://islamqa.info/en/168773