Esther 2:5

2:5 Now there happened to be a Jewish man in Susa the citadel whose name was Mordecai. He was the son of Jair, the son of Shimei, the son of Kish, a Benjaminite,

Esther 8:10

8:10 Mordecai wrote in the name of King Ahasuerus and sealed it with the king’s signet ring. He then sent letters by couriers on horses, who rode royal horses that were very swift.