After having given commandment — In Acts 1:3 St. Luke expresses in general terms what Christ said to his apostles during those forty days. But in the 4th Acts 1:4 and following verses he declares what he said on the day of his ascension. He had brought his former account down to that day; and from that day begins the Acts of the Apostles.
Related Commentaries of Acts 1:2
Acts 1:2
2 Until the day in which he was taken up, after that he through the Holy Ghost had given commandments unto the apostles whom he had chosen: