Luke 18:1

And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:

Luke 18:7

And will not God avenge his chosen, who cry to him day and night, though he be slow to punish in their behalf?

Philippians 4:6-7

Be anxious about nothing, but in everything by prayer and supplication with thanksgiving let your requests be made 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
And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:
Philippians 4:6
Be anxious about nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God;