Luke 18:1

AND he spoke also a parable to them, that men ought to pray at all times, and not to faint;

Philippians 4:6

Be anxious for nothing, but with all prayer and supplication with thanksgiving let your requests be made known to God.

Colossians 4:2

Be constant in prayer, watching in it with thanksgiving,

Treasury of Scripture Knowledge

Summary

Because he hath inclined his ear unto me, therefore will I call upon him as long as I live.

Bible References

Therefore

Luke 18:1
AND he spoke also a parable to them, that men ought to pray at all times, and not to faint;
Philippians 4:6
Be anxious for nothing, but with all prayer and supplication with thanksgiving let your requests be made known to God.
Colossians 4:2
Be constant in prayer, watching in it with thanksgiving,