Knowledge

Bukhari :: Book 1 :: Volume 3 :: Hadith 97

Narrated Ibn 'Abbas:

Once Allah's Apostle came out while Bilal was accompanying him. He went towards the women thinking that they had not heard him (i.e. his sermon). So he preached them and ordered them to pay alms. (Hearing that) the women started giving alms; some donated their ear-rings, some gave their rings and Bilal was collecting them in the corner of his garment.

Bukhari :: Book 1 :: Volume 3 :: Hadith 95

Narrated Anas:

Whenever the Prophet spoke a sentence (said a thing), he used to repeat it thrice so that the people could understand it properly from him and whenever he asked permission to enter, (he knocked the door) thrice with greeting

Bukhari :: Book 1 :: Volume 3 :: Hadith 96

Narrated 'Abdullah bin 'Amr:

Once Allah's Apostle remained behind us in a journey. He joined us while we were performing ablution for the 'Asr prayer which was over-due. We were just passing wet hands over our feet (not washing them properly) so the Prophet addressed us in a loud voice and said twice or thrice, "Save your heels from the 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)."

Bukhari :: Book 1 :: Volume 3 :: Hadith 99

Narrated Abdullah Ibn Dinar:

also narrates the same (above-mentioned statement) as has been narrated by 'Umar bin 'Abdul 'Aziz up to "The religious scholar (learned men) will pass away (die)."