Luke 18:1

He also told them a parable about the need of always praying and never losing heart.

Philippians 4:6

Never be anxious, but always make your requests known to God in prayer and supplication with thanksgiving;

Colossians 4:2

Attend to your prayers, maintain your zest for prayer by 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
He also told them a parable about the need of always praying and never losing heart.
Philippians 4:6
Never be anxious, but always make your requests known to God in prayer and supplication with thanksgiving;
Colossians 4:2
Attend to your prayers, maintain your zest for prayer by thanksgiving;