Full Idea
If bodies, and the places and times when they are said to move, are divided into infinity, motion will not occur, it being impossible to find anything which will initiate the first movement.
Gist of Idea
If time and place are infinitely divided, it becomes impossible for movement ever to begin
Source
Sextus Empiricus (Outlines of Pyrrhonism [c.180], III.76)
Book Reference
Sextus Empiricus: 'Outlines of Pyrrhonism', ed/tr. Bury,R.G. [Prometheus 1990], p.215