43 The text of Esther does not disclose exactly how Mordecai learned about the plot against the king’s life. Ancient Jewish traditions state that Mordecai overheard conspiratorial conversation, or that an informant brought this information to him, or that it came to him as a result of divine prompting. These conjectures are all without adequate support from the biblical text. The author simply does not tell the source of Mordecai’s insight into this momentous event.
44 The simply reads “Esther” and does not include “the queen.”
45 The adds here “the things concerning the plot.” Heb “in the name of Mordecai” (so ); “giving credit to Mordecai.”

In other versions

And this came to the knowledge of Mordecai, and he told it to Queen Esther, and Esther told the king in the name of Mordecai.

But Mordecai found out about the plot and told Queen Esther, who in turn reported it to the king, giving credit to Mordecai.

When Mordecai learned of the plot, he reported it to Queen Esther, and she told the king on Mordecai’s behalf.

But Mordecai heard about the plot and gave the information to Queen Esther. She then told the king about it and gave Mordecai credit for the report.

And the matter became known to Mordecai and he told it to Queen Esther, and Esther told it to the king in the name of Mordecai.

And the thing was known to Mordecai, who told it unto Esther the queen; and Esther certified the king thereof in Mordecai’s name.

Public Domain