Bukhari :: Book 6 :: Volume 60 :: Hadith 175
Narrated Ibn Abbas:
When the Verse:-- "If there are twenty steadfast amongst you, they will overcome two hundred." (8.65) was revealed, then it became obligatory for the Muslims that one (Muslim) should not flee from ten (non-Muslims). Sufyan (the sub-narrator) once said, "Twenty (Muslims) should not flee before two hundred (non Muslims)." Then there was revealed: 'But now Allah has lightened your (task)..' (8.66)
So it became obligatory that one-hundred (Muslims) should not flee before two hundred (non-muslims). (Once Sufyan said extra, "The Verse: 'Urge the believers to the fight. If there are twenty steadfast amongst you (Muslims) ..' was revealed.) Sufyan said, "Ibn Shabrama said, "I see that this order is applicable to the obligation of enjoining good and forbidding evil."
Muslim :: Book 40 : Hadith 6830
Umar b. Muhammad b. Zaid b. 'Abdullah b. 'Umar b. al-Khattab reported on the authority of his father Abdullah b. Umar that Allah's Messenger (may peace big upon him) said: When the inmates of Paradise would go to Paradise and the inmates of Hell would go to Hell, death would be called and it would be placed between the Paradise and the Hell and then slaughtered and then the announcer would announce: 0 inmates of Paradise, no death 0 Inmates of Hell-Fire, no death. And it would in. crease the delight of the inmates of Paradise and it would increase the grief of the inmates of Hell-Fire.
Bukhari :: Book 1 :: Volume 3 :: Hadith 98
Narrated Abu Huraira:
I said: "O Allah's Apostle! Who will be the luckiest person, who will gain your intercession on the Day of Resurrection?" Allah's Apostle said: O Abu Huraira! "I have thought that none will ask me about it before you as I know your longing for the (learning of) Hadiths. The luckiest person who will have my intercession on the Day of Resurrection will be the one who said sincerely from the bottom of his heart "None has the right to be worshipped but Allah."
And 'Umar bin 'Abdul 'Aziz wrote to Abu Bakr bin Hazm, "Look for the knowledge of Hadith and get it written, as I am afraid that religious knowledge will vanish and the religious learned men will pass away (die). Do not accept anything save the Hadiths of the Prophet. Circulate knowledge and teach the ignorant, for knowledge does not vanish except when it is kept secretly (to oneself)."