Sahih Muslim | Book 20 | Chapter 2

Narrated by It has been narrated on the authority of 'Abdullah b. 'Umar who
It has been narrated on the authority of 'Abdullah b. 'Umar who said: I was present with my father when he was wounded. People praised him and said: May God give you a noble recompense ! He said: I am hopeful (of God's mercy) as well as afraid (of His wrath) People said: Appoint anyone as your successor. He said: Should I carry the burden of conducting your affairs in my life as well as in my death? (So far as Caliphate is concerned) I wish I could acquit myself (before the Almighty) in a way that there is neither anything to my credit nor anything to my discredit. If I would appoint my successor, (I would because) one better than me did so. (He meant Abu Bakr.) If I would leave You alone, (I would do so because) one better than me, i.e. the Messenger of Allah (may peace be upon him), did so. 'Abdullah says: When he mentioned the Messenger of Allah (may peace be upon him) I understood that he would not appoint anyone as Caliph.

Narrated by It has been
It has been reported on the authority of Ibn 'Umar who said: I entered the apartment of (my sister) Hafsa. She said: Do you know that your father is not going to nominate his successor? I said: He won't do that (i.e. he would nominate). She said: He is going to do that. The narrator said: I took an oath that I will talk to him about the matter. I kept quiet until the next morning, still I did not talk to him, and I felt as if I were carrying a mountain on my right hand. At last I came to him and entered his apartment. (Seeing me) he began to ask me about the condition of the people, and I informed him (about them). Then I said to him: I heard something from the people and took an oath that I will communicate it to you. They presume that you are not going to nominate a successor. If a grazer of camels and sheep that you had appointed comes back to you leaving the cattle, you will (certainly) think that the cattle are lost. To look after the people is more serious and grave. (The dying Caliph) was moved at my words. He bent his head in a thoughtful mood for some time and raised it to me and said: God will doubtlessly protect His religion. If I do not nominate a successor (I have a precedent before me), for the Messenger of Allah (may peace be upon him) did not nominate his successor. And if I nominate one (I have a precedent), for Abu Bakr did nominate. The narrator (Ibn Umar) said: By God, when he mentioned the Messenger of Allah (may peace be upon him) and Abu Bakr, I (at once) understood that he would not place anyone at a par with the Messenger of Allah (may peace be upon him) and would not nominate anyone.