Acts 12:3

3 When he saw that this met with approval among the Jews, he proceeded to seize Peter also. This happened during the Festival of Unleavened Bread.

Read Acts 12:3 Using Other Translations

And because he saw it pleased the Jews, he proceeded further to take Peter also. (Then were the days of unleavened bread.)
and when he saw that it pleased the Jews, he proceeded to arrest Peter also. This was during the days of Unleavened Bread.
When Herod saw how much this pleased the Jewish people, he also arrested Peter. (This took place during the Passover celebration. )

What does Acts 12:3 mean?

John Gill's Exposition of the Bible
Acts 12:3

And because he saw it pleased the Jews
That is, as Beza's ancient copy adds, "his stretching out his hands upon the faithful"; this pleased the Jews, a bloodthirsty generation of men, who had killed the prophets, and the Lord Jesus, and who were now greedy after the death of the apostles: it may easily be seen from what principle and spirit Herod acted; it was not out of regard to the Jewish religion, rites, and ceremonies, but to ingratiate himself into the affections of the people:

he proceeded further to take Peter also;
a principal apostle, and who was well known, and against whom the Jews had doubtless a particular antipathy, and would have been glad to have been rid of him; this Herod was, sensible of, and therefore to please them, ordered him to be taken up:

then were the days of unleavened bread;
or the feast of the passover.

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