Acts 12:5

Then was Peter kept in prison. But prayer was made without ceasing of the congregation unto God for him.

2 Corinthians 1:11

by the help of your prayer for us: That by the means of many occasions, thanks may be given of many on our behalf, for the grace given unto us.

Isaiah 62:6-7

Upon the walls of Jerusalem, I have set keepers which shall never cease, neither by day nor yet by night.

Matthew 18:19

Again, I say unto you that if two of you shall agree, in earth, upon any manner thing, whatsoever they shall desire; it shall be given them of my father which is in heaven.

Luke 18:1

He put forth a similitude unto them, signifying that men ought always to pray, and not to be weary,

Acts 12:12

And as he considered the thing, he came to the house of Mary the mother of one John, which was called Mark also, where many were gathered together in prayer.

1 Corinthians 12:26

And if one member suffer, all suffer with him: if one member be had in honour, all members be glad also.

Ephesians 6:18-20

and pray always with all manner prayer and supplication - and that in the spirit - and watch thereunto with all instance and supplication for all saints,

1 Thessalonians 5:17

Pray continually.

Hebrews 13:3

Remember them that are in bonds, even as though ye were bound with them. Be mindful of them which are in adversity, as ye which are yet in your bodies.

James 5:16

Knowledge your faults one to another: and pray one for another, that ye may be healed. The prayer of a righteous man availeth much, if it be fervent.

Treasury of Scripture Knowledge

Summary

Peter therefore was kept in prison: but prayer was made without ceasing of the church unto God for him.

General references

Bible References

Prayer was made without ceasing, or, instant and earnest prayer was made

Acts 12:12
And as he considered the thing, he came to the house of Mary the mother of one John, which was called Mark also, where many were gathered together in prayer.
Isaiah 62:6
Upon the walls of Jerusalem, I have set keepers which shall never cease, neither by day nor yet by night.
Matthew 18:19
Again, I say unto you that if two of you shall agree, in earth, upon any manner thing, whatsoever they shall desire; it shall be given them of my father which is in heaven.
Luke 18:1
He put forth a similitude unto them, signifying that men ought always to pray, and not to be weary,
1 Corinthians 12:26
And if one member suffer, all suffer with him: if one member be had in honour, all members be glad also.
2 Corinthians 1:11
by the help of your prayer for us: That by the means of many occasions, thanks may be given of many on our behalf, for the grace given unto us.
Ephesians 6:18
and pray always with all manner prayer and supplication - and that in the spirit - and watch thereunto with all instance and supplication for all saints,
1 Thessalonians 5:17
Pray continually.
Hebrews 13:3
Remember them that are in bonds, even as though ye were bound with them. Be mindful of them which are in adversity, as ye which are yet in your bodies.
James 5:16
Knowledge your faults one to another: and pray one for another, that ye may be healed. The prayer of a righteous man availeth much, if it be fervent.

General references

Acts 5:18
and laid hands on the apostles, and put them in the common prison.