'Letters' in the Bible

and requested letters from him to the synagogues in Damascus, so that if he found any men or women who belonged to the Way, he might bring them as prisoners to Jerusalem.

as both the high priest and the whole council of elders can testify about me. After I received letters from them to the brothers, I traveled to Damascus to bring those who were prisoners there to be punished in Jerusalem.

Then they said to him, “We haven’t received any letters about you from Judea. None of the brothers has come and reported or spoken anything evil about you.