Luke 1:55
"As he spake to our fathers, to Abraham, and to his seed for ever."
Cross References (ranked by relevance)
And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.
And I will make thy seed to multiply as the stars of heaven, and will give unto thy seed all these countries; and in thy seed shall all the nations of the earth be blessed;
And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice.
And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.
And thy seed shall be as the dust of the earth, and thou shalt spread abroad to the west, and to the east, and to the north, and to the south: and in thee and in thy seed shall all the families of the earth be blessed.