Esther 9:24–28

²⁴For Haman the son of Hammedatha the Agagite, the oppressor 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; ²⁵and when Esther came before the king, he commanded by letters that his wicked device, which he had devised against the Jews, should return upon his own head; and they hanged him and his sons on the gallows. ²⁶Therefore they called these days Purim after the name of Pur. Therefore, according to all the words of this letter, and for what they had seen concerning this matter and what had happened to them, ²⁷the Jews ordained and took upon them, and upon their seed, and upon all such as joined themselves to them, so that it should not fail, that they would observe these two days according to their writing and according to their fixed time, every year; ²⁸and that these days should be remembered and observed throughout every generation, in every family, every province, and every city, and that these days of Purim should not fail from among the Jews, nor the memorial of them cease from among their seed.