Book of Trials and Great Battles

It is narrated from Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) that he said: We were standing with the Messenger of Allah (peace and blessings be upon him) when a man came and said: O Messenger of Allah, how long is the period of prosperity of your Ummah? The Messenger of Allah (peace and blessings be upon him) remained silent until he had asked three times. Then the man turned to leave, and the Messenger of Allah (peace and blessings be upon him) said: "Bring that man to me." He was called, and he came back, and the Messenger of Allah (peace and blessings be upon him) said to him: "You have asked me about something that no one of my Ummah has asked me about. The period of prosperity of my Ummah is a hundred years; the period of prosperity of my Ummah is a hundred years; the period of prosperity of my Ummah is a hundred years." He said: O Messenger of Allah, is there any sign or mark of that? He (peace and blessings be upon him) said: "Yes: a rain of stones (al-qadhf), sinking into the earth (al-khasf), earthquakes (al-rajf), and the release of bridled devils among the people."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Hudhayfah bin al-Yaman (may Allah be pleased with him) that he said: I know two religious groups of the Ummah of Muhammad (peace and blessings be upon him) who will be in the Fire. One of them will say: If our forefathers were astray (so what?), and they will say: What need is there for five prayers in a day and night? There are only two prayers: Asr and Fajr. And the other group says: Faith is merely verbal speech, even if a person commits adultery and even if he kills.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.