וַיַּ֣רְא הָמָ֔ן כִּי־אֵ֣ין מָרְדֳּכַ֔י כֹּרֵ֥עַ וּמִֽשְׁתַּחֲוֶ֖ה ל֑וֹ וַיִּמָּלֵ֥א הָמָ֖ן חֵמָֽה׃
And when Haman saw that Mordecai bowed not down, nor prostrated himself before him, then was Haman full of wrath.
Read kabbalistic (mystical) interpretation of Esther 3:5: and classical mystical sources.