Those who buy bread instead of baking it...

 
הלוקח תבואה מן השוק למה הוא דומה? לתינוק שמתה אמו, ומחזירין אותו על פתחי מיניקות אחרות ואינו שבע. 
הלוקח פת מן השוק למה הוא דומה? כאילו חפור וקבור. 
האוכל משלו דומה לתינוק המתגדל על שדי אמו. 

Rabbi Achai the son of Yoshia says:
What do you compare someone to who buys produce from the market (instead of growing it)?

To a baby whose mother has passed on and goes around trying to nurse from others and is never satisfied.

What do you compare someone to who buys bread from the market (instead of baking his own)?

To someone dead and buried!

Rather, a person who eats from his own efforts is like a baby who is nurtured from his mother's bosom

אבות דרבי נתן - פרק שלושים



כי תבא

(סו) חייך תלואים לך
זה הלוקח תבואה מן השוק:

ולא תאמין בחייך -
זה הסומך על הפלטר:

Ki Tavo verse: 66
Your life will be hanging in front of you. (by a thread)
This refers to someone who buys produce from the market.

You will not believe in your life .
This refers to someone who buys bread from the baker

-in both cases you are dependent on someone else for life's basics so its as if your life was is hanging by a thread and you can not trust you will be alive.

However, I particularly like the Message of how people should bake their own bread. :)