Charles Ellicott Commentary Isaiah 56:7

"even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt-offerings and their sacrifices shall be accepted upon mine altar; for my house shall be called a house of prayer for all peoples." — Isaiah 56:7 (ASV)

Even them will I bring ... —The words foreshadow the breaking down of the middle wall of partition (Ephesians 2:14). Every privilege of the Israelite worshipper is to belong also to the proselyte. It is perhaps assumed that the proselyte is circumcised. The development of truth is in such cases gradual, and it was left for St. Paul to complete the work of Isaiah (Romans 2:26–29; Galatians 6:15).