'Descendants' in the Bible

Jonathan said to David, “Go in safety, inasmuch as we have sworn to each other in the name of the Lord, saying, ‘The Lord will be between me and you, and between my descendants and your descendants forever.’” Then he rose and departed, while Jonathan went into the city.

So now swear to me by the Lord that you will not cut off my descendants after me and that you will not destroy my name from my father’s household.”