Library Eusebius of Caesarea Church History
Book 3
Chapter 35: Justus, the Third Bishop of Jerusalem
1. But when Symeon also had died in the manner described, a certain Jew by the name of Justus succeeded to the episcopal throne in Jerusalem. He was one of the many thousands of the circumcision who at that time believed in Christ.
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.