Esther 2:21-23

21In those days, while Mordecai sat in the king's gate, two of the king's chamberlains, Bigthan and Teresh, of those which kept the threshold, were wroth, and sought to lay hand on the king Ahasuerus. 22And the thing became known to Mordecai, and he related it to Esther the queen, and Esther told it to the king in Mordecai's name. 23And the matter was investigated and found out; and they were both hanged on a tree. And it was written in the book of the chronicles before the king.