Ammianus Marcellinus Res Gestae 26.8.5

[5] When Arintheus reached Dadastana, the station where, as we have said, ¹ Jovian died, he suddenly saw Hyperechius and his forces opposed to him; he had before been merely in charge of the commander’s supplies (that is, a servant of his belly and gullet), but Procopius had entrusted him as a friend with the command of a band of auxiliaries. And scorning to overcome in battle so despicable a man, relying on his authority and his imposing stature, Arintheus ordered the enemy themselves to put their leader in irons; and thus this shadow of a commander was taken prisoner by the hands of his own men.