Esther 8:2

And the king took off his ring, which he had taken from Haman,
and gave it unto Mordecai
which, with the Persians, was a token of the strongest affection and strictest friendship ^F26; the Targum calls it his signatory ring, that with which he signed laws, edicts, letters, patents and so hereby made him keeper of the seals:

and Esther set Mordecai over the house of Haman;
appointed him her steward of the estate of Haman, the king had given her.