Truly, Athaliah, the mother of Ahaziah, seeing that her son was dead, rose up and put to death all the royal offspring
Other versions
King James Version
And when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the seed royal. English Standard Version
Now when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the royal family.New International Version
When Athaliah the mother of Ahaziah saw that her son was dead, she proceeded to destroy the whole royal family.