Either that they had presented to the death, or that they had seen and were not changed. For the death of the saints is to the good an aid, to the bad a testimony; that thus the wicked may perish without excuse in that from which the elect take example and live.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. in Ev., xxxv, 2