Usul al-Kafi
Book 2: The Book of Excellence of Knowledge

Chapter 10

Traditions 75 to 77
Dissemination of knowledge
75. Imam Jafar as-Sadiq (p): God did not seek a pledge from the uneducated to acquire knowledge unless and until he had sought from the learned ones the pledge to spread knowledge. This was so because knowledge existed before ignorance did.(B2, C10, T1)
76. Imam Muhammad al-Baqir (p): The Zakat imposed on the treasure of knowledge is to impart it to other servants of God.(B2, C10, T3)
77. Imam Jafar as-Sadiq (p) said that Prophet Isa (Jesus) (p), while addressing Bani Israel, said: Never address the ignorant (rustic) people at a high level of wisdom and intellect; this will be a torture for wisdom and intellect themselves; and do not refrain from this kind of talk with those who are intelligent enough to comprehend it. (B2, C10, T4)