Prince Hormisdas, the elder brother of Sapor, and rightful king of Persia, had, after a long imprisonment, contrived, by the help of his wife, to escape from his dungeon, and had fled to the court of Constantine as early as A.D.
323.

He had been received by the emperor with every mark of honor and distinction, had been given a maintenance suited to his rank, and had enjoyed other favors.

Sapor must have felt himself deeply aggrieved by the undue attention paid to his rival; and though he pretended to make light of the matter, and even generously sent Hormisdas the wife to whom his escape was due, he cannot but have been uneasy at the possession, by the Roman emperor, of his brother's person.

In weighing the reasons for and against war he cannot but have assigned considerable importance to this circumstance.

It did not ultimately prevent him from challenging Rome to the combat; but it may help to account for the hesitation, the delay, and the fluctuations of purpose, which we remark in his conduct during the four or five years which immediately preceded the death of Constantine..