elephantis vi magna propulsis, quos flammis coniectis undique circumnexos, iam corporibus tactis, gradientesque retrosus regere magistri non poterant,
Translation :
The elephants, too, were driven back with great violence, for they were surrounded by firebrands thrown at them from every side, and as soon as these touched their bodies, they turned tail and their drivers were unable to control them.
Edition :
Ammianus Marcellinus. With An English Translation. John C. Rolfe, Ph.D., Litt.D. Cambridge. Cambridge, Mass., Harvard University Press; London, William Heinemann, Ltd. 1935-1940.