The Ecclesiastical History of Socrates Scholasticus

It was decided therefore that Lucifer should go to Antioch in Syria, and Eusebius to Alexandria, that by assembling a Synod in conjunction with Athanasius, they might confirm the doctrines of the church. Lucifer sent a deacon as his representative, by whom he pledged himself to assent to whatever the Synod might decree; but he himself went to Antioch, where he found the church in great disorder, the people not being agreed among themselves. For not only did the Arian heresy, which had been introduced by Euzoïus, divide the church, but, as we before said, the followers of Meletius also, from attachment to their teacher, separated themselves from those with whom they agreed in sentiment. When therefore Lucifer had constituted Paulinus their bishop, he again departed.