Library Eusebius of Caesarea Church History
Book 6
Chapter 17: The Translator Symmachus
As to these translators it should be stated that Symmachus was an Ebionite. But the heresy of the Ebionites, as it is called, asserts that Christ was the son of Joseph and Mary, considering him a mere man, and insists strongly on keeping the law in a Jewish manner, as we have seen already in this history. Commentaries of Symmachus are still extant in which he appears to support this heresy by attacking the Gospel of Matthew. Origen states that he obtained these and other commentaries of Symmachus on the Scriptures from a certain Juliana, who, he says, received the books by inheritance from Symmachus himself.
English translation by Arthur Cushman McGiffert, in Nicene and Post-Nicene Fathers, Series II, Vol. I (eds. Philip Schaff and Henry Wace; Buffalo: Christian Literature Publishing Co., 1890). Public domain. Digital text via New Advent Church Fathers.