1 Peter 5:1

Who am a fellow-elder

(ο συνπρεσβυτερος). Earliest use of this compound in an inscription of B.C. 120 for fellow-elders (alderman) in a town, here only in N.T., in eccles. writers. For the word πρεσβυτερος in the technical sense of officers in a Christian church (like elder in the local synagogues of the Jews) see Acts 11:30; Acts 20:17. It is noteworthy that here Peter the Apostle (1 Peter 1:1) calls himself an elder along with (συν) the other "elders."A witness

(μαρτυς). This is what Jesus had said they must be (Acts 1:8) and what Peter claimed to be (Acts 3:15; Acts 10:39). So Paul was to be a μαρτυς (Acts 22:15).Who am also a partaker

(ο κα κοινωνος). "The partner also," "the partaker also." See Luke 5:10; 2 Corinthians 1:7; 2 Peter 1:4. See same idea in Romans 8:17. In Galatians 3:23; Romans 8:18 we have almost this about the glory about to be revealed to us where μελλω as here is used with the infinitive.