Al-A‘mash reported God’s messenger as saying, "The calamitywhich affects knowledge is forgetfulness, and wasting it is to convey it tothose who are unworthy of it.” Darimi transmitted it in mursal form.

knowledge in theheart, which is the beneficial type; and knowledge on the tongue, whichis God’s allegation against a human being.” Darimi transmitted it.

Abu Huraira said, "I have kept in my memory two large quantities*of learning from God’s messenger, one of which I have disclosed amongyou; but were I to disclose the other, this bul'um, meaning the foodtract, would be cut". Bukhari transmitted it.*Lit. receptacles, or vessels.

Ibn Sirin said, “This knowledge is a religion, so consider from whomyou receive your religion.” Muslim transmitted it.

Ibn ‘Abbas reported God’s messenger as saying, “Be on your guardabout tradition from me, except what you know; for he who lies aboutme deliberately will certainly come to his abode in hell.” Tirmidhitransmitted it, and Ibn Majah transmitted it from Ibn Mas'ud and Jabir,but did not mention, “ Be on your guard about tradition from me, exceptwhat you know.”

Abu Huraira reported God’s messenger as saying, “Disputationabout the Qur’an is infidelity.” Ahmad and Abu Dawud transmitted it.

Abu Huraira reported God’s messenger as saying, "Learn thethings which are made obligatory and the Qur’an, and teach them topeople, for I shall die.” Tirmidhi transmitted it.

Ikrima reported Ibn ‘Abbas as saying, “Talk to the people onceevery Friday, but if you object, then twice, and if you want more, thenthree times, but do not weary the people with this Qur’an. And do notlet me find you coming to the people when they are talking about theirconcerns, interrupting them in their talk by addressing them, and sowearying them. Keep silent, and when they request you, talk to themat a time when they want it. Look out for rhymed prose in supplications and avoid it, for I know that God’s messenger and his companionsdid not use it.” Bukhari transmitted it.

Abu Huraira reported God’s messenger as saying, “Among theactions and good deeds for which a believer will continue to receive reward after his death are knowledge which he taught and spread, a goodson whom he left behind, or a copy of the Qur'an which he left as alegacy, or a mosque which he built, or a house which he built for thetraveller, or a stream which he caused to flow, or a sadaqa which hegave from his property when he was alive and well, for which he willcontinue to receive reward after his death.” Ibn Majah transmitted it,and also Baihaqi in Shu'ab al-iman.

Ibn ‘Abbas reported God’s messenger as saying, “Some amongmy people will become learned in religion, will recite the Qur’an, andsay that they will go to princes and get some of their worldly goods,but withdraw from them with their religion. That cannot be; for, aswhat is gathered from tragacanth trees consists only of thorns, so whatis gathered from drawing near to them consists only of . . . ” Muhammadb. as-Sabbah said that he obviously meant “sins." Ibn Majah transmitted it.

Abu Darda’ said that the one who would have the worst position inGod’s sight on the day of resurrection would be a learned man who didnot profit from his learning.” Darimi transmitted it.

Ziyad b. Hudair said that ‘Umar asked him whether he knew whatdemolishes Islam, and that when he replied that he did not, he said,"The slip of a learned man, the disputation of a hypocrite about theBook, and the rule of imams who lead men astray.” Darimi transmittedit.

Hudhaifa said, “ If you Qur'an readers follow a straight course youwill have attained great precedence; but if you go right and left you willhave fallen into vast error.” Bukhari transmitted it.

Abu Huraira reported God’s messenger as saying, “Seek refuge inGod from the pit of sorrow.” On being asked what the pit of sorrow was,he replied, “ It is a wadi in jahannam from which jahannam seeks refuge four hundred times every day.” When God’s messenger was askedwho would enter it, he replied, “The Qur’an readers who are ostentatious in what they do.” Tirmidhi transmitted it, and Ibn Majah has thesame, adding in it, “Among the Qur’an readers who are most hateful toGod are those who visit princes.” Al-Muharibi said that he meanttyrants.

The Prophet mentioned a matter, saying,“That will be at the time when knowledge departs.” I asked, “How canknowledge depart when we recite the Qur’an and teach it to our childrenand they will teach it to their children up till the day of resurrection?”He replied, “ I am astonished at you,* Ziyad. I thought you were themost learned man in Medina. Do not these Jews and Christians read theTorah and the Injil without knowing a thing about their contents?”Ahmad and Ibn Majah transmitted it, Tirmidhi transmitted somethingsimilar from him, as did Darimi from Abu Umama.

Abu Huraira reported God’s messenger as saying, "Knowledge from which no benefit is derived is like a treasure from which nothing is expended in God’s path.” Darimi transmitted it.