Ammianus Marcellinus Res Gestae 25.3.23

[23] As this made them all silent, he himself engaged with the philosophers Maximus ¹ and Priscus in an intricate discussion about the nobility of the soul. ² Suddenly the wound in his pierced side opened wide, the pressure of the blood checked his breath, and after a draught of cold water for which he had asked, in the gloom of midnight he passed quietly away in the thirty-second year of his age. Born in Constantinople, he was left alone in childhood by the death both of his father Constantius (who, after the decease of his brother Constantinus, met his end with many others in the strife for the succession to the throne) ³ and of his mother Basilina, who came from an old and noble family. ⁴