'Letters' in the Bible

and asked of him letters to Damascus unto the synagogues, that if he found any that were of the Way, whether men or women, he might bring them bound to Jerusalem.

As also the high priest doth bear me witness, and all the estate of the elders: from whom also I received letters unto the brethren, and journeyed to Damascus to bring them also that were there unto Jerusalem in bonds to be punished.

And they said unto him, We neither received letters from Judaea concerning thee, nor did any of the brethren come hither and report or speak any harm of thee.