Luke 1:55

“And I will establish My covenant between Me and you and your seed after you throughout their generations for an everlasting covenant, to be God to you and to your seed after you.

Then Hannah prayed and said, “My heart exults in Yahweh; My horn is exalted in Yahweh; My mouth speaks boldly against my enemies, Because I am glad in Your salvation.

Now the promises were spoken to Abraham and to his seed. He does not say, “And to seeds,” as referring to many, but rather to one, “And to your seed,” that is, Christ.