The emperor, amazed at the prophecies concerning Christ which were expounded to him by the priests, sent for some skillful artisans, and commanded them to remodel the standard called by the Romans Labarum,
Christianity · Church History · Ecclesiastical History
Book I, Ch. 4 — Constantine commands the Sign of the Cross to be carried before him in Battle; an Extraordinary Narrative about the Bearers of the Sign of the Cross.
Ecclesiastical History · Salminius Hermias Sozomen