It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "If a person is asked about knowledge and he conceals it, then on the Day of Resurrection, Allah Almighty will bridle him with fire."

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "Indeed, the example of knowledge from which no benefit is derived is like that of a treasure which is not spent in the way of Allah, the Exalted."

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When I was taken on the Night Journey (Isra), I passed by some people whose lips were being cut with scissors of fire." I said: "O Jibril! Who are these people?" He said: "These are the preachers of your Ummah who command others to do good but forget their own selves, while they recite the Book. Do they not then understand?"

Sayyiduna Abu Dharr (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: "You are now in a time in which scholars are many and preachers are few. In such a time, whoever does not act even upon a tenth of his knowledge will be destroyed. But soon there will come a time upon the people in which scholars will be few and preachers will be many. In that time, whoever acts even upon a tenth of his knowledge will attain salvation."

Shaqiq (may Allah have mercy on him) says that someone said to Sayyiduna Usama bin Zaid (may Allah be pleased with him): "Will you not go and speak to this man, meaning Sayyiduna Uthman (may Allah be pleased with him)?" He replied: "Do you think that whenever I speak to him, I will make you hear it? By Allah! Without announcing anything, I have spoken to him, and in that gathering, only he and I were present. I do not like to be the first to announce such matters." After hearing this hadith, I will not say about any person that he is the best among the people, even if he is my leader. The Prophet (peace and blessings be upon him) said: "A man will be brought on the Day of Resurrection and he will be thrown into the Fire. His intestines will come out and he will begin to circle around them in Hell as a donkey circles around a millstone. Seeing his condition, the people of Hell will gather around him and say: 'Did you not used to command us to do good and forbid us from evil?' He will say: 'Yes, I used to command you to do good but I did not do it myself, and I used to forbid you from evil but I used to commit it myself.'"

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "The knowledge through which the Face of Allah Almighty is sought—whoever learns it to acquire worldly goods, he will not even smell the fragrance of Paradise on the Day of Resurrection."