Berean Standard Bible (BSB)
So the Jews agreed to continue the custom they had started, as Mordecai had written to them.
World English Bible (WEB)
The Jews accepted the custom that they had begun, as Mordecai had written to them;
Strong's King James
And the Jews{H3064} undertook{H6901}{(H8765)} to do{H6213}{(H8800)} as they had begun{H2490}{(H8689)}, and as Mordecai{H4782} had written{H3789}{(H8804)} unto them;
The F.O.G *
So the Y'hudim accepted what they had begun to do, and what Mordekhai had written to them.
The F.O.G Message *
Young's Literal Translation
And the Jews have received that which they had begun to do, and that which Mordecai hath written unto them,