Time by Plotinus...

If, then, the Soul withdrew, sinking itself again into its primal unity, Time would disappear:

the origin of Time, clearly, is to be traced to the first stir of the Soul’s tendency towards the production of the sensible Universe with the consecutive act ensuing.

This is how ‘Time’—as we read—‘came into Being simultaneously with’ this All:

the Soul begot at once the Universe and Time; in that activity of the Soul this Universe sprang into being; the activity is Time, the Universe is a content of Time.


-- Enneads, III. 7. 12.
Plotinus