'Seed' in the Bible

He will take a tenth of your seed and of the fruit of your vines and give it to his servants.

And Jonathan said to David, Go in peace, for we two have taken an oath, in the name of the Lord, saying, The Lord will be between me and you, and between my seed and your seed for ever. Then David went away, and Jonathan went into the town.

So give me your oath by the Lord, that you will not put an end to my seed after me or let my name be cut off from my father's family.