Luke 18:1

Now He told them the following story to show how necessary it is for people always to pray and never to give up:

Philippians 4:6

Stop being worried about anything, but always, in prayer and entreaty, and with thanksgiving, keep on making your wants known to God.

Colossians 4:2

You must persevere in prayer and by this means stay wide awake when you give thanks.

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
Now He told them the following story to show how necessary it is for people always to pray and never to give up:
Philippians 4:6
Stop being worried about anything, but always, in prayer and entreaty, and with thanksgiving, keep on making your wants known to God.
Colossians 4:2
You must persevere in prayer and by this means stay wide awake when you give thanks.