Esther 9:27 in the King James Version
The Jews ordained, and took upon them, and upon their seed, and upon all such as joined themselves unto them, so as it should not fail, that they would keep these two days according to their writing, and according to their appointed time every year;
Context
26 Therefore they called these days “Purim”, from the word “Pur.” Therefore because of all the words of this letter, and of that which they had seen concerning this matter, and that which had come to them,
27 the Jews established and imposed on themselves, on their descendants, and on all those who joined themselves to them, so that it should not fail that they would keep these two days according to what was written and according to its appointed time every year;
28 and that these days should be remembered and kept throughout every generation, every family, every province, and every city; and that these days of Purim should not fail from among the Jews, nor their memory perish from their offspring.