pesachim 50

only in the next world, in the bright sun, are the letters of God's name said as they are written.

in this world, the ones who write the letters aleph, daled, yod and heh, are kept in poverty, so that they will always have to work and keep spinning out the words.

(this page is the ending of chapter 3. it finishes describing the world to come, when the sun will burn very bright and God's name will be pronounced as it written and not as it is said in this world. the next chapter discusses the custom of not working on the eve of Pesach, either from midday. they say that any work done right before, or straight after a festival day or shabbat, will not be profitable. This leads to listing other work that is not profitable, including relying on wife's spinning business, or being a scribe. The scribes is explained that they should always need to work and thus always have a supply of scribal material)

shabbat 133

inky fingers & blood on their hands
3 types of skilled professionals: the sofer, the mohel, and the doctor

the sofer can make the mitzvot beautiful
but the mohel can be excommunicated and struck off
and the doctor can be made redundant if the rabbis teach all the healing secrets

(the sofer, an expert scribe, is an example of making mitzvot beautiful to God. if the mohel does not complete the circumcision he is punished with karet, excommunication. if he endangers the infant he is to be removed from his position. later in the page Abaye and Rava explain what makes a healing bandage. the doctor of Mehoza's son are upset as this would deprive them of a livelihood.  for english translation of this talmud page, see here)