The doctrine that the poor only shall be saved. Ebion, plural ebionim (poor).
“At the end of the second century the Ebionites were treated as heretics, and a pretended leader (Ebion) was invented by Tertullian to explain the name.” —Renan: Life of Jesus, chap. xi.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894