'Assassinate' in the Bible

During those days while Mordecai was sitting at the King’s Gate, Bigthan and Teresh, two eunuchs who guarded the king’s entrance, became infuriated and planned to assassinate King Ahasuerus.

They found the written report of how Mordecai had informed on Bigthana and Teresh, two eunuchs who guarded the king’s entrance, when they planned to assassinate King Ahasuerus.