As also the high priest doth bear me witness
 Either Annas, or Caiaphas, who was at that time high priest; and it should seem by this, that he was still in being; or else that the apostle had preserved his letter, written with his own hand, which he was able to produce at any time, as a testimony of the truth of what he had said, or was about to say; since he speaks of him (as now) bearing him witness, or as one that could: 
 and all the estate of the elders;
 the whole Jewish sanhedrim, for this character respects not men in years, but men in office, and such who were members of the high court of judicature in Jerusalem; 
 from whom also I received letters unto the brethren;
 some render it "against the brethren", as if the Christians were meant; whereas the apostle intends the Jews of the synagogue at Damascus, whom the apostle calls brethren; because they were of the same nation, and his kinsmen according to the flesh; and, at that time, of the same religion and principles with him; and this is put out of doubt, by the Syriac, Arabic, and Ethiopic versions, which render it, "the brethren that were at Damascus": and these letters were to recommend him to them, and to empower him to persecute the Christians, and to demand and require their assistance in it; the Ethiopic version calls them, "letters of power"; and it seems from hence, that these letters were received from the whole sanhedrim, as well as from the high priest, and were signed by both: 
 and went to Damascus to bring them which were there bound unto
 Jerusalem, for to be punished:
 with stripes, or with death, as they should be judged worthy; see ( Acts 9:2 ) .