'Execute' in the Bible

So Jehoshabeath, the daughter of King Jehoram, took Ahaziah's son Joash and sneaked him away from the rest of the royal descendants who were to be executed. She hid him and his nurse in the room where the bed covers were stored. So Jehoshabeath the daughter of King Jehoram, wife of Jehoiada the priest and sister of Ahaziah, hid him from Athaliah so she could not execute him.

However, he did not execute their sons. He obeyed the Lord's commandment as recorded in the law scroll of Moses, "Fathers must not be executed for what their sons do, and sons must not be executed for what their fathers do. A man must be executed only for his own sin."