Esther 7:5

Then the king Ahasuerus answered and said unto Esther the queen, Who is he, and where is he, that durst presume in his heart to do so?

Cross-reference

Esther 9:25 Historical context

Esther 9:25 reveals the outcome—Haman's plot returned on his own head, fulfilling the justice set in motion by the king's question.

Job 18:8 Parallel

Job 18:8 describes the wicked caught in his own net—exactly what happens to Haman after the king's inquiry exposes him.

Proverbs 14:17 states a man of wicked intentions is hated—Haman is that man, and the king's question reveals his evil.