Is it true that no post-apostolic theologians before St. Augustine believed in Eternal Security / Assurance of Salvation?

According to *Wikipedia* in it's entry of 'perseverance of the saints', eternal security has its roots in Church Father St. Augustine of Hippo. Considering that Augustine lived centuries after the Apostolic Age, and the variety of theologians that have predated him (from Origen to Athanasius the Great, Polycarp to Ignatius of Antioch), were the Early Church Fathers really so uniform in thought concerning salvation? I find it especially hard to believe because of the fractured and polemical nature of early Christianity, as it was full of controversy and wavering opinions surrounding essential doctrines (ie. Christology).