'Letter' in the Bible

So now send a letter about the Jews, writing whatever seems good to you, in the king's name, and stamping it with the king's ring: for a writing signed in the king's name and stamped with the king's ring may not be changed.

And in every part of the kingdom and in every town, wherever the king's letter and his order came, the Jews were glad with great joy, and had a feast and a good day. And a great number of the people of the land became Jews: for the fear of the Jews had come on them.

So these days were named Purim, after the name of Pur. And so, because of the words of this letter, and of what they had seen in connection with this business, and what had come to them,

The Jews made a rule and gave an undertaking, causing their seed and all those who were joined to them to do the same, so that it might be in force for ever, that they would keep those two days, as ordered in the letter, at the fixed time every year;

Then Esther the queen, daughter of Abihail, and Mordecai the Jew, sent a second letter giving the force of their authority to the order about the Purim.