'Seed' in the Bible

Their blood shall therefore return upon the head of Joab, and upon the head of his seed for ever: but upon David, and upon his seed, and upon his house, and upon his throne, shall there be peace for ever from the LORD.

And the LORD stirred up an adversary unto Solomon, Hadad the Edomite: he was of the king's seed in Edom.

And I will for this afflict the seed of David, but not for ever.

And with the stones he built an altar in the name of the LORD: and he made a trench about the altar, as great as would contain two measures of seed.