In Panarion 30.3.3-6, we read the following description of Ebionite theology from Epiphanius:
3,3 For some of them even say that Adam is
Christ—the man who was formed first and infused with God’s breath. (4) But
others among them say that he is from above; created before all things, a
spirit, both higher than the angels and Lord of all; and that he is called
Christ, the heir of the world there. But he comes here when he chooses, as he
came in Adam and appeared to the patriarchs clothed with Adam’s body. And in
the last days the same Christ who had come to Abraham, Isaac and Jacob, came
and donned Adam’s body, and appeared to men, was crucified, rose and ascended.
(6) But again, when they choose to, they say, “No! The Spirit—that is, the
Christ—came to him and put on the man called Jesus.” And they get all giddy
from making different suppositions about him at different times (The
Panarion of Epiphanius of Salamis, Book 1 (Sects 1-46) [trans. Frank
Williams; Nag Hammadi and Manichaean Studies 63; Leiden: Brill, 2009], 133)