Esther 2:21-23

²¹And in those days, as Mor'decai was sitting at the king's gate, Bigthan and Teresh, two of the king's eunuchs, who guarded the threshold, became angry and sought to lay hands on King Ahasu-e'rus. ²²And this came to the knowledge of Mor'decai, and he told it to Queen Esther, and Esther told the king in the name of Mor'decai. ²³When the affair was investigated and found to be so, the men were both hanged on the gallows. And it was recorded in the Book of the Chronicles in the presence of the king.