As many as walk according to this rule - Τῳ κανονι τουτῳ· This canon; viz. what is laid down in the preceding verses, that redemption is through the sacrifice of Christ; that circumcision and uncircumcision are equally unavailable; and that none can be saved without being created anew. This is the grand canon or rule in Christianity.
Peace be on them - Those who act from this conviction will have the peace and mercy of God; for it is in this way that mercy is communicated and peace obtained.
The Israel of God - The true Christians, called here the Israel of God, to distinguish them from Israel according to the flesh. See the notes on Romans 2:29; Romans 4:12; (note).
And as many as walk - As many as live, for so the word walk is used in the Scriptures. According to this rule. Greek: “This canon”; see the word explained in the notes at 2 Corinthians 10:13.
Peace be on them - See the note at Romans 15:33.
And upon the Israel of God - The true church of God; all who are his true worshippers; see the note at Romans 2:28-29; Romans 9:6, note.