Acts 12:3

And, because he saw it pleased the people— This prince, as Josephus tells us, was a great zealot for the Mosaic law; dwelt much at Jerusalem, and was as fond of all opportunities to oblige the Jews, as his grandfather Herod had been of pleasing strangers—a character very agreeable to what St. Luke here says of him. St. Peter was apprehended about the beginning of April, and most probably in the third year of Claudius Caesar.