"I heard the Messenger of Allah say: 'Do not acquire knowledge in order to show off before the scholars, or to argue with the foolish, or to attract people's attention, for whoever does that will be in Hell.'"

“I heard the Messenger of Allah (saw) saying: ‘This world is cursed and what is in it is cursed, except the remembrance of Allah (dhikr) and what is conducive to that, or one who has knowledge or who acquires knowledge.’”

The Prophet (saws) said: If anyone acquires knowledge that should be sought seeking the Face of Allah, but he acquires it only to get some worldly advantage, he will not experience the arf, i.e. the fragrance, of Paradise.

"The Messenger of Allah said: 'Whoever acquires knowledge by which the pleasure of Allah is sought, but he only acquires it for the purpose of worldly gain, will not smell the fragrance of Paradise on the Day of Resurrection.'" (Hasan) Another chain with similar wording.

The Messenger of Allah(PBUH) said, "He who does not acquire knowledge with the sole intention of seeking the Pleasure of Allah but for worldly gain, will not smell the fragrance of Jannah on the Day of Resurrection."

[Abu Dawud].

Abu Huraira reported God’s messenger as saying, “If anyone acquires knowledge of things by which God’s good pleasure is sought, but acquires it only to get some worldly advantage, he will not experience the ‘arf, i.e. the odour, of paradise on the day of resurrection.” Ahmad, Abu Dawud and Ibn Majah transmitted it.

A man announced (the loss of his camel) in the mosque, uttering these words: "Has any one seen my red camel?" Upon this the Messenger of Allah (PBUH) said, "May it not be restored to you! The mosques are built for what they are meant to be (i.e., prayer, remembrance of Allah, acquiring knowledge, etc.)."

[Muslim].

Ibn Mas'ud reported that God's messenger said to him, "Acquire knowledge and teach it to the people, learn the obligatory duties and teach them to the people, learn the Qur’an and teach it to the people; for I am a man who will be taken away, knowledge will be taken away, dissensions will appear, so that two men will disagree about an obligatory duty and find no one to decide between them.” Darimi and Daraqutni transmitted it.

There were two brothers in the days of the Prophet (PBUH). One of them used to attend the Prophet's circle (to acquire knowledge) and the other used to earn their living). Once the latter complained to the Prophet (PBUH) against the former (for not earning his living). He (PBUH) replied, "Perhaps you are being provided because of him".

[At- Tirmidhi, who said it has a sound chain].

Anas b. Malik said that God’s messenger asked, “Do you know who is most generous?" On receiving the reply that God and His messenger knew best, he said, “God is the most generous, then I am the most generous of mankind, and the most generous of them after me will be a man who acquires knowledge and spreads it. On the day of resurrection he will come as a prince alone.” Or he said, “As one people."

"O Shaikh, tell me of a Hadith that you heard from the Messenger of Allah (PBUH)." (He said: "Yes; I heard the Messenger of Allah (PBUH)) say: 'The first of people for whom judgment will be passed on the Day of Resurrection are three. A man who was martyred. He will be brought and Allah will remind him of His blessings and he will acknowledge them. He will say: What did you do with them? He will say: I fought for Your sake until I was martyred. He will say: You are lying. You fought so that it would be said that so-and-so is brave, and it was said. Then He will order that he be dragged on his face and thrown into the Fire. And (the second will be) a man who acquired knowledge and taught others,and read Qur'an. He will be brought, and Allah will remind him of His blessings, and he will acknowledge them. He will say: What did you do with them? He will say: I acquired knowledge and taught others, and read the Qur'an for Your sake. He will say: You are lying. You acquired knowledge so that it would be said that you were a scholar; and you read Qur'an so that it would be said that you were a reciter, and it was said. Then He will order that he be dragged on his face and thrown into the Fire. And (the third will be) a man whom Allah made rich and gave him all kinds of wealth. He will be brought and Allah will remind him of His blessings, and he will acknowledge them. he will say: What did you do with them? He will say: I did not leave any way that You like wealth to be spent - Abu 'Abdur-Rahman (An-Nasa'i) said: I did not understand "what You like" as I wanted to [1] - "but I spent it." He will say: "You are lying. You spent it so that it would be said that he was generous, and it was said." Then he will order that he be dragged on his face and thrown into the Fire.'" [1] That is, he did not hear or understand what came after it as well as he wanted to, but it was similar to what follows regarding the spending. Similar was stated by Shaikh 'Abdur-Rahman Al-punjani in his notes on the text, according to Al-Funjani in his commentary At-Ta'iqat As-Salafiyyah (2:51)

People dispersed from around Abu Huraira, and Natil, who was from the Syrians. said to him: O Shaikh, relate (to us) a tradition you have heard from the Messenger of Allah (may peace be upon him). He said: Yes. I heard the Messenger of Allah (may peace be upon him) say: The first of men (whose case) will be decided on the Day of Judgment will be a man who died as a martyr. He shall be brought (before the Judgment Seat). Allah will make him recount His blessings (i. e. the blessings which He had bestowed upon him) and he will recount them (and admit having enjoyed them in his life). (Then) will Allah say: What did you do (to requite these blessings)? He will say: I fought for Thee until I died as a martyr. Allah will say: You have told a lie. You fought that you might be called a" brave warrior". And you were called so. (Then) orders will be passed against him and he will be dragged with his face downward and cast into Hell. Then will be brought forward a man who acquired knowledge and imparted it (to others) and recited the Qur'an. He will be brought And Allah will make him recount His blessings and he will recount them (and admit having enjoyed them in his lifetime). Then will Allah ask: What did you do (to requite these blessings)? He will say: I acquired knowledge and disseminated it and recited the Qur'an seeking Thy pleasure. Allah will say: You have told a lie. You acquired knowledge so that you might be called" a scholar," and you recited the Qur'an so that it might be said:" He is a Qari" and such has been said. Then orders will be passed against him and he shall be dragged with his face downward and cast into the Fire. Then will be brought a man whom Allah had made abundantly rich and had granted every kind of wealth. He will be brought and Allah will make him recount His blessings and he will recount them and (admit having enjoyed them in his lifetime). Allah will (then) ask: What have you done (to requite these blessings)? He will say: I spent money in every cause in which Thou wished that it should be spent. Allah will say: You are lying. You did (so) that it might be said about (You):" He is a generous fellow" and so it was said. Then will Allah pass orders and he will be dragged with his face downward and thrown into Hell.

I heard the Messenger of Allah (PBUH) saying, "The first to be judged on the Day of Resurrection will be a man who had died as a martyr. He will be brought forward. Allah will remind him of the favours He had bestowed upon him and the man will acknowledge them. Then He will ask him: 'What did you do to express gratitude for it?' The man will reply: 'I fought for Your Cause till I was martyred.' Allah will say: 'You have lied. You fought so that people might call you courageous; and they have done so.' Command will then be issued about him and he will be dragged on his face and thrown into Hell. Next a man who had acquired and imparted knowledge and read the Qur'an will be brought forward, Allah will remind him of the favours He had bestowed upon him and the man will acknowledge them. Then He will ask him: 'What did you do to express gratitude for it?' The man will reply: 'I acquired knowledge and taught it, and read the Qur'an for Your sake.' Allah will say to him: 'You have lied. You acquired knowledge so that people might call you a learned (man), and you read the Qur'an so that they might call you a reciter, and they have done so.' Command will then be issued about him, and he will be dragged on his face and thrown into Hell. Next a man whom Allah had made affluent and to whom Allah had given plenty of wealth, will be brought forward, Allah will remind him of the favours He had bestowed upon him and the man will acknowledge them. He will ask him: 'What did you do to express gratitude for it?' The man will reply: 'I did not neglect any of the ways You liked wealth to be spent liberally for Your sake'. Allah will say to him: 'You have lied. You did it so that people might call you generous, and they have done so.' Command will then be issued about him and he will be dragged on his face and thrown into Hell."

[Muslim].

Messenger of Allah, Salim (the freed slave of Abu Hudhaifa) is living with us in our house, and he has attained (puberty) as men attain it and has acquired knowledge (of the sex problems) as men acquire, whereupon he said: Suckle him so that he may become unlawful (in regard to marriage) for you He (Ibn Abu Mulaika) said: I refrained from (narrating this hadith) for a year or so on account of fear. I then met al-Qasim and said to him: You narrated to me a hadith which I did not narrate (to anyone) afterwards. He said: What is that? I informed him, whereupon he said: Narrate it on my authority that 'A'isha (Allah be pleased with her) had narrated that to me.

He also reported God’s messenger as saying, “The first person to be judged on the day of resurrection will be a man who died as a martyr. He will be brought forward, and after God has reminded him of the favour He showed him and the man acknowledges it, He will ask, ‘What did you do to show gratitude for it?’ The man will reply, ‘I fought for Thy cause till I was martyred.’ God will say, ‘You lie. You fought that people might call you courageous, and they have done so.’ Command will then be issued about him, and he will be dragged on his face and thrown into hell. Next a man who has acquired and taught knowledge and read the Qur’an will be brought forward, and after God has reminded him of the favour He showed him and the man acknowledges it, He will ask, ‘What did you do to show gratitude for it?’ The man will reply, ‘I acquired and taught knowledge and read the Qur’an for Thy sake.’ God will say, 'You lie. You acquired knowledge that people might call you learned, and you read the Qur’an that they might call you a reader, and they have done so.’ Command will then be issued about him, and he will be dragged on his face and thrown into hell. Next a man whom God has made affluent and whom He has given all kinds of property will be brought forward, and after God has reminded him of the favour He showed him and the man acknowledges it, He will ask, ‘What did you do to show gratitude for it?’ The man will reply, ‘I have not neglected to give liberally for Thy sake to all the causes approved by Thee for this purpose.’ God will say, ‘You lie. You did it that people might call you generous, and they have done so.’ Command will then be issued about him, and he will be dragged on his face and thrown into hell.” Muslim transmitted it.