Acts 12:3

And seeing that this pleased the Jews, Herod proceeded to seize Peter during the Feast of Unleavened Bread.

Note Literally seize Peter—now these were the days of the Unleavened; see Exodus 12:14–20.

BSB · Berean Standard Bible
And because he saw it pleased the Jews, he proceeded further to take Peter also. (Then were the days of unleavened bread.)
KJV · King James Version
When he saw that it pleased the Jews, he proceeded to seize Peter also. This was during the days of unleavened bread.
WEB · World English Bible
And when he saw that it pleased the Jews, he proceeded to seize Peter also. And those were the days of unleavened bread.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

he saw
Acts 24:27; Acts 25:9; John 12:43; Galatians 1:10; 1 Thessalonians 2:4
he proceeded
Acts 2:14; Acts 4:13; Psalm 76:10; John 19:11; John 21:18
Then
Exodus 12:14–20; Exodus 13:3–7; Exodus 23:15; Leviticus 23:6–14; Matthew 26:17; 1 Corinthians 5:7, 8