C. F. Keil and Franz Delitzsch on Esther 4:8

Est 4:8

Mordochai also gave Hatach a copy of the decree published in Susa (בּשׁוּשׁן נתּן, like Est 3:15) to show it to the queen. The להּ וּלהגּיד following is more correctly drawn towards the subsequent וּלצוּות, as by Bertheau, than connected according to the accentuation with what precedes. Before this infinitive must be supplied from the context, especially from Est 4:7 : and Mordochai commissioned him or told him (Hatach): to declare unto her and to command her (Esther) to go in unto the king, to entreat him and to make request before him for her people. על בּקּשׁ, to beg, to make request for something, like Ezr 8:23, and Est 7:7. עמּהּ על, concerning her people, i.e., in this connection: for them.