Esther 9:24
Because Haman the son of Hammedatha, the Agagite, the enemy of all the Jews, had devised against the Jews to destroy them, and had cast Pur, that is, the lot, to consume them, and to destroy them;
Cross-reference
Esther 9:10
Historical context
Esther 9:10 names Haman as enemy and lists his sons killed — 9:24 provides the backstory of Haman's plot that led to that judgment.
Esther 3:5–13
Historical context
Esther 3:5-13 describes Haman's plot to destroy the Jews and the casting of lots — exactly what 9:24 summarizes as the reason for Purim.
Esther 3:7
Historical context
Esther 3:7 records the casting of Pur (lots) — the specific act that 9:24 references by name ('had cast Pur, that is, cast lots').