'Offspring' in the Bible

Then all the assembly made a covenant in the house of God with the king [that is, with the child Joash, to overthrow Athaliah by proclaiming his sovereignty]. And Jehoiada [the priest] said to them, “Behold, the king’s son [Joash] shall reign, as the Lord has said in regard to the sons of David.

And the Lord sent an angel who destroyed every brave warrior, commander, and officer in the camp of the king of Assyria. So the king returned to his own land in shame. And when he entered the house (temple) of his god, some of his own children killed him there with the sword.