'Seed' in the Bible

yea, turned back hath their blood on the head of Joab, and on the head of his seed to the age; and for David, and for his seed, and for his house, and for his throne, there is peace unto the age, from Jehovah.'

And Jehovah raiseth up an adversary to Solomon, Hadad the Edomite; of the seed of the king is he in Edom;

and I humble the seed of David for this; only, not all the days.'

and he buildeth with the stones an altar, in the name of Jehovah, and maketh a trench, as about the space of two measures of seed, round about the altar.