Luke 1:72

To remember his holy covenant, i.e. of his promise, or of the covenant made with Abraham, that he would bless all nations in his seed. (Witham) --- At the coming of Christ, Abraham, Isaac and Jacob were made partakers of his mercy. For, we cannot suppose that they who saw his day, and were glad, should not participate in the fruit of his coming; since St. Paul says: he maketh peace through the blood of the cross, both to the things that are on earth, and the things that are in heaven. (Colossians i. 20.) (Origen, hom. x.)