Esther 9:27

English Standard Version

27 the Jews firmly obligated themselves and their offspring and all who joined them, that without fail they would keep these two days according to what was written and at the time appointed every year, (Es 9:21; Isa 56:3; Isa 56:6; Zec 2:11) 

New International Version

27 the Jews took it on themselves to establish the custom that they and their descendants and all who join them should without fail observe these two days every year, in the way prescribed and at the time appointed. 

New International Reader’s Version

27 So they established it as a regular practice. They decided they would always observe these two days of the year. They would celebrate in the required way. And they would celebrate at the appointed time. They and their children after them would always observe these days. And so would all who join them. 

King James Version

27 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;