Luke 18:1

Then Jesus told His disciples a parable for the purpose of showing them that they should pray continually and not become discouraged.

Luke 18:7

So, will God not grant justice to His elect [i.e., His people] who call out to Him [i.e., in prayer] day and night? Will He be slow in helping them?

Philippians 4:6-7

Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.

Treasury of Scripture Knowledge

Summary

O LORD, to thee will I cry: for the fire hath devoured the pastures of the wilderness, and the flame hath burned all the trees of the field.

Bible References

To thee

Luke 18:1
Then Jesus told His disciples a parable for the purpose of showing them that they should pray continually and not become discouraged.
Philippians 4:6
Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.