By the air which I breathe, and by the water which I drink, I will not endure to be blamed on account of this discourse.

As reported by Heraclides Ponticus (c. 360 BC), and Diogenes Laërtius, in Lives and Opinions of Eminent Philosophers, "Pythagoras", Sect. 6, in the translation of C. D. Yonge (1853)