'Seed of Abraham' in the Bible

They answered Him, We are the seed of Abraham, and never were slaves to any one, how then dost thou say, Ye shall be made free?

I know that ye are the seed of Abraham, but ye seek to kill me, because my word hath no place in you.

Nor because they are the seed of Abraham, are they all children of promise: but "in Isaac shall thy seed be called."

I say then, Hath God cast off his people? God forbid! for I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.

Are they Hebrews? so am I: are they Israelites? so am I: are they the seed of Abraham?

For indeed He taketh not hold of angels to save them, but of the seed of Abraham.