When the Event inevitable shall come to pass.
When the inevitable comes to pass.
When the Event (the resurrection) come
When the Event comes to pass -
When/if the battle/Resurrection/event fell/happened
When the inevitable day of doom takes place
When the forthcoming event does occur
When the Inevitable event comes to pass
When what is to occur (the Hour of Resurrection) will occur
(Beware of the time) when the inevitable (and the promised) Event shall come to pass
When the Event (i.e. the Day of Resurrection) befalls