The Roman History · Amm. 20.11.3

But he, vowing with many oaths that he would rather lose his life than change his opinion, received ample rewards, and returned to his kingdom with the retinue which he brought with him; and never ventured at any subsequent time to break any of his promises, being bound by many ties of gratitude to Constantius. The strongest tie of all being that the emperor had given him for a wife, Olympias, the daughter of Abladius, formerly prefect of the prætorium, who had once been betrothed to his own brother Constans.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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