Translation:Mishnah/Seder Nezikin/Tractate Avot/Chapter 4/2
English Translation
editBen Azzai says:
Run to do an easy mitzvah, and flee from sin;
since one mitzvah leads to another mitzvah, and one sin leads to another sin;
since the reward for a mitzvah is another mitzvah, and the reward for one sin is another sin.