A mother's revenge comes back against her

In the 11th chapter, from the book of 2 Kings, we find Athaliah.  She was the mother of Abaziah, who had died.  In revenge, she vowed to kill the rest of the royal family.

She accomplished this task, save for one: Joash.  His aunt, along with a servant, hid him for six long years while Athaliah reigned over the land in all of her wickedness.

In the seventh year, however, Joash came out from hiding and was anointed king in Judah.  He made a covenant with God.  When his mother saw him, she cried out.  He sent servants to take her out of the Lord's house and put her to death.

Then, in accordance with the will of God, he destroyed the house of Baal and had all of the Baal priests put to death.