He doth friendly embrace and wish happiness to all and every sanctified one who is a member of Christ, hath entirely resigned up to him, and doth abide in him. Then shows, that most probably his colleagues and fellow labourers in the Christian church at Rome, (calling such elsewhere brethren, 1 Corinthians 1:1 Colossians 1:1, Colossians 4:7 Philemon 1:1,7,20), Philippians 1:14, Philippians 2:25 1 Corinthians 16:20, do so likewise.
Related Commentaries of Philippians 4:21
Philippians 4:21
21 Salute every saint in Christ Jesus. The brethren which are with me greet you.