Narrated 'Umar:
One day the Prophet (s.a.w.a.) stood up amongst us for a long period and informed us about the beginning of creation (and talked about everything in detail) till he mentioned how the people of Paradise will enter their places and the people of Hell will enter their places. Some remembered what he had said, and some forgot it.
Hudhaifa reported that Allah's Messenger (s.a.w.a.) stood before us one day and he did not leave anything unsaid (that he had to say) at that very spot which would happen (in the shape of turmoil) up to the Last Hour. Those who had to remember them preserved them in their minds and those who could not remember them forgot them. My friends knew them and there are certain things which slip out of my mind, but I recapitulate them when anyone makes a mention of them just as a person is lost from one's mind but is recalled to him on seeing his face.
Abu Zaid (viz. Amr b. Akhtab) reported:
Allah's Messenger (s.a.w.a.) led us in the dawn prayer and then mounted the pulpit and addressed us until it was (time for the) noon prayer. He then came down the pulpit and observed prayer and then again mounted the pulpit and again addressed us until it was time for the 'Asr prayer. He then again came down and observed the prayer and again mounted the pulpit and addressed us until the sun was set and he informed (about) everything (pertaining to turmoil) that lay hidden in the past and what lies in (the womb) of) the future and the most learned amongst us is one who remembers them well
Abu Sa'eed Al-Khudri said:
"One day, the Messenger of Allah(s) led us in Salat Al-Asr while it was still daytime. Then he stood to give us a Khutbah. He did not leave anything that would happen until the Hour of Judgement except that he informed us about it. Whoever remembered it remembered it, and whoever forgot it forgot it. Among what he said was: 'Indeed the world is green and sweet, and indeed Allah has left you to remain to see how you behave. So beware of the world, and beware of the women.' And among what he said was: 'The awe(status) of people should not prevent a man from saying the truth when he knows it."'He(one of the narrators) said: "Abu Sa'eed wept, then he said: 'By Allah! We have seen things and we feared."' "And among what he said in it, was : 'Indeed, for every treacherous person there shall be a banner erected on The Day Of Resurrection in proportion to his treachery. And there is no treachery greater than the treachery of a leader to the masses' whose banner shall be positioned at his buttocks.' And among what we remember from that day is: 'Behold! Indeed the children of Adam were created in various classes. Among them is he who was born a believer, lives as a believer, and dies a believer. Among them, is he who was born a disbeliever, lives as a disbeliever, and dies a disbeliever. Among them, is he who was born a believer, lives as a believer, and dies a disbeliever.
Narrated Hudhaifa:
The Messenger of Allah (s.a.w.a.) stood among us (to give us an address) and he left out nothing that would happen up to the last hour without telling of it. Some remembered it and some forgot, and these Companions of his have known it. When something of it which I have forgotten happens, I remembered it, just as a man remembers another's face when he is a away and recognizes him when he sees him.