Esther 9:24-26

Holman Christian Standard Bible

²⁴ For Haman son of Hammedatha the Agagite, the enemy of all the Jews,^(A) had plotted against the Jews to destroy them. He cast the Pur (that is, the lot) to crush and destroy them.^{(B) 25} But when the matter was brought before the king,^(C) he commanded by letter that the evil plan Haman had devised against the Jews return on his own head^(D) and that he should be hanged with his sons on the gallows.^{(E) 26} For this reason these days are called Purim, from the word Pur.^(F)

Because of all the instructions in this letter as well as what they had witnessed and what had happened to them,