Luke 18:1

And he spake a parable to them to this end, that they ought always to pray, and not to faint;

Luke 18:7

And shall not God vindicate his own elect, who cry to him day and night, though he bear long with them?

Philippians 4:6-7

Be careful for nothing, but in every thing 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 spake a parable to them to this end, that they ought always to pray, and not to faint;
Philippians 4:6
Be careful for nothing, but in every thing by prayer and supplication with thanksgiving let your requests be made known to God: