Is the term Body of Christ used anywhere in the Bible outside of Paul's writings?
No. The term “Body of Christ” is Pauline and exclusive to Paul’s writings; it is never used anywhere else in Scripture. It is tied to the Gospel of Grace given to Gentiles, not the Jewish Gospel of the Kingdom. Believers of the Gospel of Grace are many members yet one body in Christ.
Les teaches that the Body of Christ is a Pauline term exclusively, and that it is never used anywhere else in Scripture. He contrasts Paul’s concern with the Body of Christ and the Gospel of Grace, which goes to Gentiles, with the Gospel of the Kingdom, which was Jewish. He illustrates the body by noting that all members do not have the same office: fingers, toes, eyes, and ears each have an intrinsic purpose. Believers of the Gospel of Grace, being many, are one body in Christ and members one of another. He also gives the example of believers in the jungles of Bolivia and believers in Oklahoma and America being members of the same spiritual organism.