Esther 2:23
And when inquisition was made of the matter, it was found out; therefore they were both hanged on a tree: and it was written in the book of the chronicles before the king.
Cross-reference
Esther 6:1
Parallel
Esther 6:1 mentions the book of annals where Mordecai's service was recorded in 2:23—this sets up his honor.
Esther 6:2
Citation
Esther 6:2 explicitly cites the record of Mordecai exposing the conspiracy from 2:23—a direct narrative callback.
Esther 7:10
Parallel
Esther 7:10 records Haman hanged on his own gallows—poetic justice echoing the conspirators' fate in 2:23.
Deuteronomy 21:22
Historical context
Deuteronomy 21:22 gives the law for hanging a criminal's body on a pole—the practice followed in Esther 2:23.
Joshua 10:26
Parallel
In Joshua 10:26, Joshua hangs enemy kings on trees — a similar execution method to the conspirators hanged here.