Esther 9:21

9:21 to have them observe the fourteenth and the fifteenth day of the month of Adar each year

Esther 9:29

9:29 So Queen Esther, the daughter of Abihail, and Mordecai the Jew wrote with full authority to confirm this second ¹  letter about Purim.

¹ tc The LXX and the Syriac Peshitta omit the word “second.”