Acts 12:5

Peter was therefore kept in custody: but incessant prayer was made to God for him by the church.

2 Corinthians 1:11

you also assisting by prayer for us, that the favor obtained for us by the prayers of many might be thankfully acknowledged by many on our account.

Matthew 18:19

And I tell you moreover, that if but two of you shall agree on earth concerning any thing which they would ask for, it shall be granted them by my Father who is in heaven:

Luke 18:1

And He spake also a parable to them, to shew that men ought always to pray, and not to faint:

Acts 12:12

And considering with himself, he came to the house of Mary the mother of John, who was sirnamed Mark, where many were gathered together and praying.

1 Corinthians 12:26

And so if one member suffer all the members suffer with it; and if one member be honoured, all the members rejoice with it.

Ephesians 6:18-20

praying at all seasons with all prayer and supplication in the Spirit, and watching thereunto with all perseverance, and intercession for all the saints;

1 Thessalonians 5:17

Pray continually.

Hebrews 13:3

Remember those that are in bonds, as if bound with them: and those that suffer evil as being yourselves also in the body.

James 5:16

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

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 considering with himself, he came to the house of Mary the mother of John, who was sirnamed Mark, where many were gathered together and praying.
Matthew 18:19
And I tell you moreover, that if but two of you shall agree on earth concerning any thing which they would ask for, it shall be granted them by my Father who is in heaven:
Luke 18:1
And He spake also a parable to them, to shew that men ought always to pray, and not to faint:
1 Corinthians 12:26
And so if one member suffer all the members suffer with it; and if one member be honoured, all the members rejoice with it.
2 Corinthians 1:11
you also assisting by prayer for us, that the favor obtained for us by the prayers of many might be thankfully acknowledged by many on our account.
Ephesians 6:18
praying at all seasons with all prayer and supplication in the Spirit, and watching thereunto with all perseverance, and intercession for all the saints;
1 Thessalonians 5:17
Pray continually.
Hebrews 13:3
Remember those that are in bonds, as if bound with them: and those that suffer evil as being yourselves also in the body.
James 5:16
Confess your faults one to another, and pray for one another, that ye may be healed: the fervent prayer of a righteous man availeth much.

General references

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