Iussique universi in eius nomen iurare, sollemniter, gladiis cervicibus suis admotis, sub exsecrationibus diris, verbis iuravere conceptis, omnes pro eo casus, quoad vitam profuderint (si necessitas adegerit) perlaturos; quae secuti rectores, omnesque principis proximi, fidem simili religione firmarunt.
And when all had been bidden to take the usual oath of allegiance, aiming their swords at their throats, they swore in set terms under pain of dire execrations, that they would endure all hazards for him, to the extent of pouring out their life-blood, if necessity required; their officers and all the emperors closest advisers followed their example, and pledged loyalty with like ceremony.
final_alignments\Ammianus_Marcellinus_Book21.json