2 It was found recorded there that Mordecai had exposed Bigthana and Teresh, two of the king’s officers who guarded the doorway, who had conspired to assassinate King Xerxes.

Read Esther 6:2 Using Other Translations

And it was found written, that Mordecai had told of Bigthana and Teresh, two of the king's chamberlains, the keepers of the door, who sought to lay hand on the king Ahasuerus.
And it was found written how Mordecai had told about Bigthana and Teresh, two of the king's eunuchs, who guarded the threshold, and who had sought to lay hands on King Ahasuerus.
In those records he discovered an account of how Mordecai had exposed the plot of Bigthana and Teresh, two of the eunuchs who guarded the door to the king’s private quarters. They had plotted to assassinate King Xerxes.