2 Chronicles 22:10

But, when, Athaliah mother of Ahaziah, saw that her son was dead, she rose up and destroyed all the seed royal of the house of Judah.

2 Kings 11:1-3

Now, when, Athaliah, mother of Ahaziah, saw that her son was dead, she arose and destroyed all the seed royal.

2 Chronicles 22:2-4

Forty-two years old, was Ahaziah when he began to reign, and, one year, reigned he in Jerusalem, - and, the name of his mother, was Athaliah, daughter of Omri.

Treasury of Scripture Knowledge

Summary

But when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the seed royal of the house of Judah.

Bible References

Athaliah

2 Chronicles 22:2
Forty-two years old, was Ahaziah when he began to reign, and, one year, reigned he in Jerusalem, - and, the name of his mother, was Athaliah, daughter of Omri.
2 Kings 11:1
Now, when, Athaliah, mother of Ahaziah, saw that her son was dead, she arose and destroyed all the seed royal.