Full Idea
The hand washes the hand; give something and you may get something.
Gist of Idea
Hands wash hands; give that you may get
Source
Epicharmus (comedies (frags) [c.470 BCE], B30), quoted by (who?) - where?
Book Reference
'Ancilla to the Pre-Socratic Philosophers', ed/tr. Freeman,Kathleen [Harvard 1957], p.37