Esther 9:1 sets the date (13th of Adar) and reversal — here that day is the fight, followed by rest on the 14th.

Esther 9:18 explains Susa fought on 13th and 14th, resting on 15th — contrasting with provincial rest on 14th here.

In Esther 9:21, Mordecai institutes the annual celebration of the 14th and 15th of Adar, directly based on the rest day in 9:17 for the provinces.

Esther 3:12 shows Haman's decree on the 13th of Nisan; Esther 9:17 has the Jews' victory on the 13th of Adar—a reversal on the same day number.

In Esther 8:9, the counter-decree is dated; it empowered the Jews to defend themselves on the 13th of Adar, leading to the rest in 9:17.

In Esther 3:7, the lot cast for destruction fell on Adar; Esther 9:17 shows that month became the time of deliverance—a direct reversal.

In Esther 8:17, the Jews have joy and feasting upon hearing the counter-decree; Esther 9:17 repeats 'feasting and joy' after the battle.

Esther 8:16 describes Jewish joy after the counter-decree; Esther 9:17 echoes this joy after the victory—parallel celebrations.