Bigtan (also Bigthan) was a court official — a eunuch and doorkeeper of King Ahasuerus — who conspired with Teresh to assassinate the king. Mordecai discovered the plot and reported it through Esther. The king's life was spared, and the incident was recorded in the royal chronicles — a record that would later be read aloud on a sleepless night, changing the fate of the Jewish people.
Providence radiates through Bigtan's conspiracy. What seems like a minor administrative note becomes the axis on which the entire book of Esther turns. God's invisible hand orchestrates even the king's insomnia to bring Mordecai's loyalty to light. No act of faithfulness, however small, escapes God's ledger. 'For such a time as this' is prepared by a thousand unseen moments.