| Barnes' Notes on the Bible And we are witnesses - We who are apostles. See the notes on Luke 24:48. In the land of the Jews - In the country of Judea. Whom they slew ... - Our translation would seem to imply that there were two separate acts - first executing him, and then suspending him. But this is neither according to truth nor to the Greek text. The original is simply, "whom they put to death, suspending him on a tree." On a tree - On a cross. See the notes on Acts 5:30.
Clarke's Commentary on the BibleWe are witnesses of all - In this speech St. Peter may refer, not only to the twelve apostles, but to the six brethren whom he had brought with him. Whom they slew - As the truth of the resurrection must depend on the reality of the death of Christ, it was necessary that this should be stated, and shown to rest on the most indubitable evidence.
Gill's Exposition of the Entire BibleAnd we are witnesses of all things,.... That is, Peter, and the rest of the apostles, were witnesses, even eyewitnesses, of Christ's going about from place to place, and of the good he did every where, and of the miracles which he wrought; and even of every thing which he did both in the land of the Jews; which takes in not only Judea, but Galilee, and beyond Jordan; and in Jerusalem; the metropolis of Judea: whom they slew and hanged on a tree; whom the Jews put to death; for since it was by their instigation, and at their request, it is ascribed to them; and who not content with any death, desired he might be crucified, or hanged on a tree; partly because of the pain and torture of it, and partly because of the shame and ignominy that attended it; as well as to throw off the scandal of his death from themselves to the Romans, crucifixion being a Roman punishment.
Vincent's Word StudiesThey slew The best texts insert καὶ, also: "whom also they slew;" also having an incressive force. They added this crowning atrocity to other persecutions. Tree See on Luke 23:31.
Geneva Study BibleAnd we are witnesses of all things which he did both in the land of the Jews, and in Jerusalem; whom they slew and hanged on a tree:
People's New Testament 10:39 We are witnesses. Not only of his life and power, but of his resurrection (see PNT Ac 1:21 ).
Jamieson-Fausset-Brown Bible Commentary39-43. we are witnesses of all . he did-not objects of superstitious reverence, but simply witnesses to the great historical facts on which the Gospel is founded. slew and hanged-that is, slew by hanging. on a tree-So Ac 5:30 (and see on [1989]Ga 3:13).
Matthew Henry's Concise Commentary10:34-43 Acceptance cannot be obtained on any other ground than that of the covenant of mercy, through the atonement of Christ; but wherever true religion is found, God will accept it without regarding names or sects. The fear of God and works of righteousness are the substance of true religion, the effects of special grace. Though these are not the cause of a man's acceptance, yet they show it; and whatever may be wanting in knowledge or faith, will in due time be given by Him who has begun it. They knew in general the word, that is, the gospel, which God sent to the children of Israel. The purport of this word was, that God by it published the good tidings of peace by Jesus Christ. They knew the several matters of fact relating to the gospel. They knew the baptism of repentance which John preached. Let them know that this Jesus Christ, by whom peace is made between God and man, is Lord of all; not only as over all, God blessed for evermore, but as Mediator. All power, both in heaven and in earth, is put into his hand, and all judgment committed to him. God will go with those whom he anoints; he will be with those to whom he has given his Spirit. Peter then declares Christ's resurrection from the dead, and the proofs of it. Faith has reference to a testimony, and the Christian faith is built upon the foundation of the apostles and prophets, on the testimony given by them. See what must be believed concerning him. That we are all accountable to Christ as our Judge; so every one must seek his favour, and to have him as our Friend. And if we believe in him, we shall all be justified by him as our Righteousness. The remission of sins lays a foundation for all other favours and blessings, by taking that out of the way which hinders the bestowing of them. If sin be pardoned, all is well, and shall end well for ever. | 
