So Mordecai went his way,.... About the business he was directed to; the word used having sometimes the signification of passing over or transgressing, Jarchi interprets it of Mordecai's transgressing the command, by fasting on a festival; the letter being written on the thirteenth of Nisan, Esther 3:12, the next day was the passover, on which he supposes the fast began; and the three days were, the fourteenth, fifteenth, and sixteenth of the month, and belonged to the feast of the passover and of unleavened bread; so the Targum:
and did according to all that Esther had commanded him; got the Jews together, and kept a fast three days; according to the Midrash (e) they were the thirteenth, fourteenth, and fifteenth of Nisan.
(e) Midrash Esther, fol. 94. 4.

And Mordochai went his way, i.e., from the place before the court of the king, to do what the queen had commanded him to do.