Armenia in comments -- Book: Colossians (tCol) Կողոսացիներ
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tCol 3:15 And let the peace of God - Instead of Θεου, God, Χριστου, Christ, is the reading of ABC*D*FG, several others, both the Syriac, the Arabic of Erpen, Coptic, Ethopic, Armenian, Vulgate, and Itala, with several of the fathers; on this evidence Griesbach has inserted it in the text.
Rule in your hearts - Βραβευετω· Let the peace of Christ judge, decide, and govern in your hearts, as the brabeus, or judge, does in the Olympic contests. No heart is right with God where the peace of Christ does not rule; and the continual prevalence of the peace of Christ is the decisive proof that the heart is right with God. When a man loses his peace, it is an awful proof that he has lost something else; that he has given way to evil, and grieved the Spirit of God. While peace rules, all is safe.
In one body - Ye cannot have peace with God, in yourselves, nor among each other, unless ye continue in unity; and, as one body, continue in connection and dependence on him who is your only head: to this ye are called; it is a glorious state of salvation, and ye should be for ever thankful that ye are thus privileged. Colossians 3:16