Knowledge and the Virtue of Teaching It
The Holy Prophet (S) said: "Someone who possesses knowledge on a subject but conceals it when he is asked will be bridled with reins of fire." (Therefore, if a person possesses information that would help a bewildered person and improve his situation but he remains silent, he has surely committed a great sin.)
Al -'Ithna-'Ashariyyah, p. 11
The Holy Prophet (S) said: "The Qur’an is Allah's university; so, learn as much as you can in this university."
Bihar-ul-Anwar, vol. 92, p.19
The Holy Prophet (S) said: "Verily, what will continue to reach a believer, after his death, from amongst his actions and good deeds are: the knowledge which he taught and spread, the righteous child whom he left behind, and the Holy script which he delivered as heritage (transcribed, and made available)."
Sunan- Ibn-Majeh, vol. 1, p. 88
Abul-Hasan-ir-Ridha’ (as.), the eighth Imam, said: "May the Mercy of Allah be upon the servant who keeps alive our commandment." Then the person attending the Imam asked him (‘a) how their commandment could be kept alive and he (‘a) replied: "He (can) learn our sciences and teach them to people. In fact, if people knew (the merits and) the goodness of our statements, surely they would follow us."
Ma'ani-ul-Akhbar, p.180 & 'Uyun-il-Akhbar-ir-Ridha’, vol.1, p. 207