Sahih Muslim Book 25, Hadith 30
Thursday, and what about Thursday? Then tears began to flow until I saw them on his cheeks as it they were the strings of pearls. He (the narrator) said that Allah's Messenger (ﷺ) said: Bring me a shoulder blade and ink-pot (or tablet and inkpot), so that I write for you a document (by following which) you would never go astray. They said: Allah's Messenger (may peace upon him) is in the state of unconsciousness.
Thursday, (and then said): What is this Thursday? He then wept so much that his tears moistened the pebbles. I said: Ibn 'Abbas, what is (significant) about Thursday? He (Ibn 'Abbas) said: The illness of Allah's Messenger (ﷺ) took a serious turn (on this day), and he said: Come to me, so that I should write for you a document that you may not go astray after me. They (the Companions around him) disputed, and it is not meet to dispute in the presence of the Apostle. They said: How is lie (Allah's Apostle)? Has he lost his consciousness? Try to learn from him (this point). He (the Holy Prophet) said: Leave me. I am better in the state (than the one in which you are engaged). I make a will about three things: Turn out the polytheists from the territory of Arabia; show hospitality to the (foreign) delegations as I used to show them hospitality. He (the narrator) said: He (Ibn Abbas) kept silent on the third point, or he (the narrator) said: But I forgot that.
This hadith was mentioned through another chain.
When Allah's Messenger (ﷺ) was about to leave this world, there were persons (around him) in his house, 'Umar b. al-Kbattab being one of them. Allah's Apostle (ﷺ) said: Come, I may write for you a document; you would not go astray after that. Thereupon Umar said: Verily Allah's Messenger (ﷺ) is deeply afflicted with pain. You have the Qur'an with you. The Book of Allah is sufficient for us. Those who were present in the house differed. Some of them said: Bring him (the writing material) so that Allah's Messenger (ﷺ) may write a document for you and you would never go astray after him And some among them said what 'Umar had (already) said. When they indulged in nonsense and began to dispute in the presence of Allah's Messenger (ﷺ), he said: Get up (and go away) 'Ubaidullah said: Ibn Abbas used to say: There was a heavy loss, indeed a heavy loss, that, due to their dispute and noise. Allah's Messenger (ﷺ) could not write (or dictate) the document for them.