This term is rooted in the greeting that Jewish people said to each other by saying the word shalom.
Its meaning is reflected in the Old Testament hope for an era of peace (shalom), when God’s people would be delivered from their enemies and enjoy both physical and spiritual well being. The word has to do with expression of the way things should be, the harmony that is to exist among God’s people and his creation.
2 To the saints and faithful brothers in Christ at Colossae: Grace to you and peace from God our Father.