Luke 18:1

Then Jesus told His disciples a parable for the purpose of showing them that they should pray continually and not become discouraged.

Philippians 4:6

Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.

Colossians 4:2

Continue to pray regularly; stay alert and be thankful.

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
Then Jesus told His disciples a parable for the purpose of showing them that they should pray continually and not become discouraged.
Philippians 4:6
Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.
Colossians 4:2
Continue to pray regularly; stay alert and be thankful.