Urging the spreading of knowledge

It is narrated from the father of Abu Kathir that he said: I came to Sayyiduna Abu Dharr (may Allah be pleased with him) while he was at the middle Jamrah, and a crowd of people had gathered around him to ask about religious rulings. Meanwhile a man came and stood over him and said: "Did the Commander of the Believers not forbid you from giving fatwas?" He relates that Sayyiduna Abu Dharr (may Allah be pleased with him) raised his head toward him and said: "Have you been appointed as a watchman and guard over me? Even if you were to place on this" and he pointed to the nape of his neck "the sharpest sword, and I were certain that I could convey to others a word I heard from the Messenger of Allah (peace and blessings be upon him) before you (kill me and) finish with me, I would surely convey it."
This hadith is sahih (authentic), and Imam al-Bukhari (may Allah have mercy on him) cited a part of it in mu'allaq form in the Book of Knowledge.

It is narrated from Sayyiduna Abu Hurayrah and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them) that the Messenger of Allah (peace and blessings be upon him) delivered a sermon to us in which he (peace and blessings be upon him) said: "Whoever acquires knowledge, adopts humility and modesty for the sake of knowledge, and teaches it to the servants of Allah Almighty solely for the pleasure of Allah, the Mighty and Majestic, and the reward that is with Him, there will be no one in Paradise with a better reward than him or a higher rank than him. There will be no station in Paradise, nor any lofty and precious rank, in which he does not have the most abundant share and the best dwelling. Remember! Seeking knowledge is surely the most excellent act of worship, and the very foundation of the religion rests on scrupulousness and piety. In truth, the scholar is only the one who acts upon his knowledge, even if his knowledge is little."
This report is mawdu' (fabricated); its chain contains liars and matruk (abandoned) narrators such as Maysarah bin Abd Rabbih and Dawud bin al-Muhabbar. Al-Busiri recorded it in 'Ithaf al-Khiyarah al-Maharah'.

It is narrated from an elder of the tribe of Nakha' that he said: I entered the mosque of Jerusalem (the mosque of Iliya) and prayed two rak'ahs facing a pillar. Meanwhile a man came and prayed nearby, and people were drawn toward him. When I looked, it was Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both). Then the messenger of Yazid bin Mu'awiyah came with the message: "Answer his (Yazid's) summons." He said: "This man wants to stop me from narrating hadith just as his father used to forbid me, whereas I myself heard the Messenger of Allah (peace and blessings be upon him) saying" and then he narrated a hadith.
Imam Musaddad recorded it in his Musnad.