Draw water from the new well, but do not spit in the old one.
More Bulgarian Proverbs:
He, who buys what he does not need, sells what he needs.Bulgarian
He who breaks his word shall through his word be broken.
Bulgarian
He who lives by the sword shall die by the sword.
Bulgarian
Gravediggers have their own gravediggers too.
Bulgarian
The Chicken teaches the hen to lay eggs.
Bulgarian
If you go to sleep with the blind, you'll wake up squinting.
Bulgarian