Torah comes from the Children of the Poor

 Nedarim (81a) Be on guard against scabs; take good care to study in company and be heedful not to neglect the children of the poor, for from them Torah goeth forth, as it is written, The water shall flow out of his buckets meaning, from the poor amongst them goeth forth Torah. And why is it not usual for scholars to give birth to sons who are scholars? — Said R. Joseph, That it might not be maintained, The Torah is their legacy. R. Shisha, the son of R. Idi, said: That they should not be arrogant towards the community. Mar Zutra said: Because they act high-handedly against the community. R. Ashi said: Because they call people asses. Rabina said: Because they do not first utter a blessing over the Torah.