2 Chronicles 22:10

Now when Athaliah, the mother of Ahaziah, saw that her son was dead, she had all the rest of the seed of the kingdom of Judah put to death.

2 Kings 11:1-3

Now when Athaliah, the mother of Ahaziah, saw that her son was dead, she had all the rest of the seed of the kingdom put to death.

2 Chronicles 22:2-4

Ahaziah was twenty-two years old when he became king, and he was ruling in Jerusalem for one year. His mother's name was Athaliah, the 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
Ahaziah was twenty-two years old when he became king, and he was ruling in Jerusalem for one year. His mother's name was Athaliah, the daughter of Omri.
2 Kings 11:1
Now when Athaliah, the mother of Ahaziah, saw that her son was dead, she had all the rest of the seed of the kingdom put to death.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain