Acts 12:3

And when he saw that it pleased the Jews, he proceeded to seize Peter also. And those were the days of unleavened bread.

Exodus 23:15

The feast of unleavened bread shalt thou keep: seven days thou shalt eat unleavened bread, as I commanded thee, at the time appointed in the month Abib (for in it thou camest out from Egypt); and none shall appear before me empty:

Acts 24:27

But when two years were fulfilled, Felix was succeeded by Porcius Festus; and desiring to gain favor with the Jews, Felix left Paul in bonds.

Acts 25:9

But Festus, desiring to gain favor with the Jews, answered Paul and said, Wilt thou go up to Jerusalem, and there be judged of these things before me?

Exodus 12:14-20

And this day shall be unto you for a memorial, and ye shall keep it a feast to Jehovah: throughout your generations ye shall keep it a feast by an ordinance for ever.

Exodus 13:3-7

And Moses said unto the people, Remember this day, in which ye came out from Egypt, out of the house of bondage; for by strength of hand Jehovah brought you out from this place: there shall no leavened bread be eaten.

Leviticus 23:6-14

And on the fifteenth day of the same month is the feast of unleavened bread unto Jehovah: seven days ye shall eat unleavened bread.

Psalm 76:10

Surely the wrath of man shall praise thee: The residue of wrath shalt thou gird upon thee.

Matthew 26:17

Now on the first day of unleavened bread the disciples came to Jesus, saying, Where wilt thou that we make ready for thee to eat the passover?

John 12:43

for they loved the glory that is of men more than the glory that is of God.

John 19:11

Jesus answered him, Thou wouldest have no power against me, except it were given thee from above: therefore he that delivered me unto thee hath greater sin.

John 21:18

Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest: but when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and carry thee whither thou wouldest not.

Acts 2:14

But Peter, standing up with the eleven, lifted up his voice, and spake forth unto them,'saying , Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and give ear unto my words.

Acts 4:13

Now when they beheld the boldness of Peter and John, and had perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.

Acts 20:6

And we sailed away from Philippi after the days of unleavened bread, and came unto them to Troas in five days, where we tarried seven days.

1 Corinthians 5:7-8

Purge out the old leaven, that ye may be a new lump, even as ye are unleavened. For our passover also hath been sacrificed, even Christ:

Galatians 1:10

For am I now seeking the favor of men, or of God? or am I striving to please men? if I were still pleasing men, I should not be a servant of Christ.

1 Thessalonians 2:4

but even as we have been approved of God to be intrusted with the gospel, so we speak; not as pleasing men, but God who proveth our hearts.

Treasury of Scripture Knowledge

Summary

And because he saw it pleased the Jews, he proceeded further to take Peter also. (Then were the days of unleavened bread.)

Bible References

He saw

Acts 24:27
But when two years were fulfilled, Felix was succeeded by Porcius Festus; and desiring to gain favor with the Jews, Felix left Paul in bonds.
Acts 25:9
But Festus, desiring to gain favor with the Jews, answered Paul and said, Wilt thou go up to Jerusalem, and there be judged of these things before me?
John 12:43
for they loved the glory that is of men more than the glory that is of God.
Galatians 1:10
For am I now seeking the favor of men, or of God? or am I striving to please men? if I were still pleasing men, I should not be a servant of Christ.
1 Thessalonians 2:4
but even as we have been approved of God to be intrusted with the gospel, so we speak; not as pleasing men, but God who proveth our hearts.

He proceeded

Acts 2:14
But Peter, standing up with the eleven, lifted up his voice, and spake forth unto them,'saying , Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and give ear unto my words.
Acts 4:13
Now when they beheld the boldness of Peter and John, and had perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.
Psalm 76:10
Surely the wrath of man shall praise thee: The residue of wrath shalt thou gird upon thee.
John 19:11
Jesus answered him, Thou wouldest have no power against me, except it were given thee from above: therefore he that delivered me unto thee hath greater sin.
John 21:18
Verily, verily, I say unto thee, When thou wast young, thou girdedst thyself, and walkedst whither thou wouldest: but when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and carry thee whither thou wouldest not.

Then

Exodus 12:14
And this day shall be unto you for a memorial, and ye shall keep it a feast to Jehovah: throughout your generations ye shall keep it a feast by an ordinance for ever.
Exodus 13:3
And Moses said unto the people, Remember this day, in which ye came out from Egypt, out of the house of bondage; for by strength of hand Jehovah brought you out from this place: there shall no leavened bread be eaten.
Exodus 23:15
The feast of unleavened bread shalt thou keep: seven days thou shalt eat unleavened bread, as I commanded thee, at the time appointed in the month Abib (for in it thou camest out from Egypt); and none shall appear before me empty:
Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread unto Jehovah: seven days ye shall eat unleavened bread.
Matthew 26:17
Now on the first day of unleavened bread the disciples came to Jesus, saying, Where wilt thou that we make ready for thee to eat the passover?
1 Corinthians 5:7
Purge out the old leaven, that ye may be a new lump, even as ye are unleavened. For our passover also hath been sacrificed, even Christ:

General references

Exodus 34:18
The feast of unleavened bread shalt thou keep. Seven days thou shalt eat unleavened bread, as I commanded thee, at the time appointed in the month Abib; for in the month Abib thou camest out from Egypt.
Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread unto Jehovah: seven days ye shall eat unleavened bread.
Numbers 28:16
And in the first month, on the fourteenth day of the month, is Jehovah's passover.

American Standard Version Public Domain