Martyr is a Greek word, that signifies a witness; and is here, and since by the ecclesiastical writers, appropriated unto such as suffer death for the testimony they give to the truths of God, or doctrine of the gospel. Consenting unto his death; as Acts 8:1. Of them that slew him; that is, of the witnesses against Stephen, as Acts 7:58. For the witnesses did slay him not only by the testimony which they gave against him, but they were to be the first who stoned him. Slew him; or murdered him.
Related Commentaries of Acts 22:20
Acts 22:20
20 And when the blood of thy martyr Stephen was shed, I also was standing by, and consenting unto his death, and kept the raiment of them that slew him.