Pythagoras & his followers also said that the void exists, and that it enters the universe from the infinite breath, the universe being supposed to breathe in the actual void, which keeps different kinds of things apart; for they define void as that which seperates and divides things that are next to each other. This happens first in numbers; the void divides their nature.
Aristotle
In the division of numbers, the even, when parted in any direction, leaves as it were within itself an end; but when the same thing is done with the odd, there is always a middle left over from the division.
Plutarch