Full Idea
With a single exception (Plato) everyone agrees about time - that it is not generated. Democritus says time is an obvious example of something not generated.
Gist of Idea
Almost everyone except Plato thinks that time could not have been generated
Source
report of Plato (works [c.375 BCE]) by Aristotle - Physics 251b14
Book Reference
'The First Philosophers', ed/tr. Waterfield,Robin [OUP 2000], p.175