Tuvel, Hersh asked:
where is there in Shass further quotes regarding teaching a parnassah
The Kollel replies:
Earlier, the Gemara (29a) states that one is obligated to teach his son a trade, as someone who does not teach his son a trade is as if he taught him how to steal (see also 30b). See also Erchin (16b) how it is good to stick with the trade of one's father.
All the best,
Yaakov Montrose