'Letters' in the Bible

And made a request for letters from him to the Synagogues of Damascus, so that if there were any of the Way there, men or women, he might take them as prisoners to Jerusalem.

And when he had a desire to go over into Achaia, the brothers gave him help, and sent letters to the disciples requesting them to take him in among them: and when he had come, he gave much help to those who had faith through grace:

Of which the high priest will be a witness, and all the rulers, from whom I had letters to the brothers; and I went into Damascus, to take those who were there as prisoners to Jerusalem for punishment.

And they said to him, We have not had letters from Judaea about you, and no one of the brothers has come to us here to give an account or say any evil about you.