Al -'Ithna-'Ashariyyah, p. 11
The Holy Prophet [s] said: "The Quran 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-i-Ibn-Majeh, vol. 1, p. 88
Abul-Hassan-ir-Rida (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-Rida, vol.1, p. 207