“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 went to Damascus, to bring them which were there bound unto Jerusalem, for to be punished.”
King James Version (KJV)
22:5 The high priest is my witness - Is able to testify. The brethren - Jews: so this title was not peculiar to the Christians.
Ac 22:5 The high priest doth bear me witness. The high priest in A.D. 37, the time Saul of Tarsus was sent to Damascus, was not now high priest, having been deposed by the Romans, but was probably a member of the Sanhedrin at this time. It is also probable that the present high priest personally knew about all facts. There were many present who knew that he had been a commissioned persecutor.