Luke 18:1

And He spake also a parable to them, to shew that men ought always to pray, and not to faint:

Colossians 4:2

Persevere in prayer, and be watchful in it, with thanksgiving.

Romans 12:12

Rejoicing in hope, patient under affliction, persevering in prayer,

Ephesians 6:18

praying at all seasons with all prayer and supplication in the Spirit, and watching thereunto with all perseverance, and intercession for all the saints;

1 Thessalonians 5:17

Pray continually.

Philippians 4:6

Be anxious in nothing: but in every thing by prayer and supplication with thanksgiving let your requests be made known before God.

Luke 21:36

Watch therefore and be constant in prayer, that ye may be counted worthy to escape all these things, which shall come to pass, and to stand before the Son of man.

Luke 11:5-9

And He said unto them, Which of you shall have a friend, and shall go to him at midnight, and say to him, Friend, lend me three loaves; for a friend of mine on his journey is come to me,

2 Corinthians 4:1

Therefore having received this ministry, as we have obtained mercy, we are not disheartened:

Galatians 6:9

And let us not be weary in doing good: for in due season we shall reap, if we faint not.

Colossians 4:12

Epaphras, who is one of you, a servant of Christ, saluteth you; who always strives earnestly for you in his prayers, that ye may stand perfect and complete in all the will of God:

Hebrews 12:3-5

Wherefore consider Him who endured such contradiction of sinners against Himself, that ye may not give out, fainting in your minds:

Treasury of Scripture Knowledge

Summary

And he spake a parable unto them to this end, that men ought always to pray, and not to faint;

General references

Bible References

And not

Galatians 6:9
And let us not be weary in doing good: for in due season we shall reap, if we faint not.
Hebrews 12:3
Wherefore consider Him who endured such contradiction of sinners against Himself, that ye may not give out, fainting in your minds:

General references

Luke 11:10
For every one that asketh receiveth, and he that seeketh findeth, and to him that knocketh it shall be opened.