Luke 18:1

Jesus told his disciples a parable to show them that they should always pray and never despair.

Philippians 4:6

Do not be anxious about anything; but under all circumstances, by prayer and entreaty joined with thanksgiving, make your needs known to God.

Colossians 4:2

Devote yourselves to prayer. Give your whole mind to it, and also offer 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
Jesus told his disciples a parable to show them that they should always pray and never despair.
Philippians 4:6
Do not be anxious about anything; but under all circumstances, by prayer and entreaty joined with thanksgiving, make your needs known to God.
Colossians 4:2
Devote yourselves to prayer. Give your whole mind to it, and also offer thanksgiving;