'Letters' in the Bible

went to the High Priest and begged from him letters addressed to the synagogues in Damascus, in order that if he found any believers there, either men or women, he might bring them in chains to Jerusalem.

as the High Priest also and all the Elders can bear me witness. It was, too, from them that I received letters to the brethren in Damascus, and I was already on my way to Damascus, intending to bring those also who had fled there, in chains to Jerusalem, to be punished.

"For our part," they replied, "we have not received any letters from Judaea about you, nor have any of our countrymen come here and reported or stated anything to your disadvantage.