Which preposition to use with aevum

in Occurrences 1%

Mors sine morte, finis sine fine; a finger burnt by chance we may not endure, the pain is so grievous, we may not abide an hour, a night is intolerable; and what shall this unspeakable fire then be that burns for ever, innumerable infinite millions of years, in omne aevum in aeternum.

Which preposition to use with  aevum