'Seed' in the Bible

And these were they that went up from Tel-melah, Tel-harsha, Cherub, Addon, and Immer; but they could not show their fathers houses, nor their seed, whether they were of Israel:

And the seed of Israel separated themselves from all foreigners, and stood and confessed their sins, and the iniquities of their fathers.

and foundest his heart faithful before thee, and madest a covenant with him to give the land of the Canaanite, the Hittite, the Amorite, and the Perizzite, and the Jebusite, and the Girgashite, to give it unto his seed, and hast performed thy words; for thou art righteous.