Athalia the Conqueress

In Melachim B (Kings II) 11:1, Athaliah, upon hearing of the death of her son, King Achaziah, proceeds to do the unthinkable and eliminates her own descendants, save one escapee, and take the throne for herself.  The Talmud tell us that this is punishment, Midah k’neged Midah, for David’s inadvertentantly causing the deaths of the Cohanim (priests) in the city of Nov (Nob) 155 years earlier.  Just as the Cohanim were wiped out, save one survivor, Evyatar, so too the House of David is punished with a similar discontinuity, which is eventually restored by the sole survivor, Yoash (Joash.)