Hudhaifa reported
We were one day in the company of 'Umar that he said: Who amongst you has preserved in his mind most perfectly the hadith of Allah's Messenger (ﷺ) in regard to the turmoil as he told about it? I said: It is I. Thereupon he said: You are bold (enough to make this claim). And he further said: How? I said: I heard Allah's Messenger (ﷺ) as saying: There would (first) be turmoil for a person in regard to his family, his property, his own self, his children, his neighbours (and the sins committed in their connection) would be expiated by fasting, prayer, charity, enjoining good and prohibiting evil. Thereupon 'Umar said: I do not mean (that turmoil on a small scale) but that one which would emerge like the mounting waves of the ocean. I said: Commander of the Faithful, you have nothing to do with it, for the door is closed between you and that. He said: Would that door be broken or opened? I said: No, it would be broken. Thereupon he said: Then it would not be closed despite best efforts. We said to Hudhaifa: Did Umar know the door? Thereupon he said: Yes, he knew it (for certain) just as one knows that night precedes the next day. And I narrated to him something in which there was nothing fabricated. Shaqiq (one of the narrators) said: We dared not ask Hudhaifa about that door. So we requested Masruq to ask him. So he asked him and he said: (By that door, he meant) 'Umar.
This hadith has been narrated on the authority of Hudhaifa through other chains of transmitters also.
Hudhaifa reported that Umar said
Who would narrate to us (the ahadith pertaining to turmoil) and he reported a hadith similar to these ahadith.
Jundub reported
I came on the day of Jara`a that a person was (found) sitting. I said: They would shed their blood today. That person said: By Allah. not at all. I said: By Allah, of course, they would do it. He said: By Allah, they would not do it. I said: By Allah, of course, they would do it. He said: By Allah, they would not do it, and I have heard a hadith of Allah's Messenger (ﷺ) which I am narrating to you in this connection. I said: You are a bad seat fellow. I have been opposing you since morning and you are listening to me in spite of the fact that you have heard a hadith from Allah's Apostle (ﷺ) (contrary to my statement). I myself felt that there was no use of this annoyance. (He could tell me earlier that it was a hadith of the Prophet (may peace be upon him], and I would not have opposed him at all.) I turned my face toward him and asked him and he was Hadrat Hudhaifa.