27 The Jews agreed that they, their children, grandchildren, and great-grandchildren, as well as all non-Jews who become Jews, should always keep these two days. They agreed to follow the written rules—and at the proper time too—every year.
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.