"In the Episcopal church they used to say something I loved: "The Body of Our Lord Jesus Christ which was given for thee. Preserve thy body and soul unto everlasting life."
In the TLM they say (in Latin)
May the Body of Our Lord Jesus Christ preserve your soul unto eternal life.
I would guess this is where the Episcopal folks got it.
Right. It's part of the mass from 1549 which the reformationists made the uniform anglican mass. Now they just say "The Body of Christ" , "The Cup of Salvation." Well, it ain't.