Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter XLI

Chapter XLI.—That in the meantime he ordered a Council to be convened at Tyre, because of Controversies raised in Egypt.

Meanwhile that spirit of envy which is the enemy of all good, like a dark cloud intercepting the sun’s brightest rays, endeavored to mar the joy of this festivity, by again raising contentions to disturb the tranquillity of the Egyptian churches. Our divinely favored emperor, however, once more convened a synod composed of many bishops, and set them as it were in armed array, like the host of God, against this malignant spirit, having commanded their presence from the whole of Egypt and Libya, from Asia, and from Europe, in order, first, to decide the questions in dispute, and afterwards to perform the dedication of the sacred edifice above mentioned. He enjoined them, by the way, to adjust their differences at the capital city of Phœnicia, reminding them that they had no right, while harboring feelings of mutual animosity, to engage in the service of God, since his law expressly forbids those who are at variance to offer their gift until they have first become reconciled and mutually disposed to peace. Such were the salutary precepts which the emperor continually kept vividly before his own mind, and in accordance with which he admonished them to undertake their present duties in a spirit of perfect unanimity and concord, in a letter to the following purport.