John Gill Commentary Luke 1:55

"(As he spake unto our fathers) Toward Abraham and his seed for ever." — Luke 1:55 (ASV)

As he spoke to our fathers
To David, of whose family Mary was; and to Jacob, or Israel, of whose stock she was; and to Isaac, in whom the seed was to be, called; and particularly,

to Abraham and to his seed for ever :
not his natural, but his spiritual seed; both among Jews and Gentiles, to the end of the world; to these God promised this mercy of a Saviour and Redeemer, and to these he performs it, and will to all generations.