Luke 18:1

He spoke an illustration to them emphasizing the need to pray and not become tired:

Colossians 4:2

Continue steadfastly in prayer, being vigilant with thanksgiving.

Romans 12:12

Rejoice in hope! Be patient in tribulation. Continue in prayer.

Ephesians 6:18

With prayer and supplication pray at all times in the Spirit. Watch with all perseverance and supplication for all the holy ones.

1 Thessalonians 5:17

Pray without ceasing.

Philippians 4:6

Be anxious for nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.

Psalm 55:16-17

But I call on God, and Jehovah saves me.

Luke 21:36

Be on the watch all the time. Pray for the strength to escape all these things in order to stand before the Son of man.

Genesis 32:24-26

Then Jacob was by himself. A man was fighting with him till dawn.

Job 27:8-10

What hope doe the godless have when he is cut off, when God takes away his life?

Psalm 27:13

I believe that I will see the goodness of Jehovah in this world of the living.

Psalm 65:2

All men will come to you O Hearer of prayer.

Psalm 86:3

Have pity on me, O Jehovah, since I call out to you all day long.

Psalm 102:17

He has respected the prayer of the destitute and has not despised their prayer.

Genesis 32:9-12

Then Jacob prayed: O God of my father Abraham, the God of my father Isaac, O Jehovah, you said to me: 'Go back to your country and your family and I will be good to you.'

Psalm 142:5-7

I call out to you, O Jehovah. I say: You are my refuge, my own inheritance in this world of the living.

Jeremiah 29:12

Then you will call to me. You will come and pray to me and I will hear you.

Jonah 2:7

My life was leaving me and I remembered Jehovah! My prayer came to you, into your Holy Temple.

Luke 11:5-9

He also said: Which of you have a friend you would approach at midnight and say lend me three loaves.

2 Corinthians 4:1

We have this ministry to do, even as we obtained mercy, we do not lose heart.

Galatians 6:9

Let us not grow tired of doing good things for in due season we shall harvest, if we do not faint.

Colossians 4:12

Epaphras, who is one of you, a servant of Christ Jesus, greets you, always striving for you in his prayers, that you may stand perfect and fully assured in all the will of God.

Hebrews 12:3-5

Consider him who endured such contrary talk by sinners against him. You should not get tired and give up in your mind (heart).

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;

Bible References

And not

Psalm 27:13
I believe that I will see the goodness of Jehovah in this world of the living.
Jonah 2:7
My life was leaving me and I remembered Jehovah! My prayer came to you, into your Holy Temple.
Galatians 6:9
Let us not grow tired of doing good things for in due season we shall harvest, if we do not faint.
Hebrews 12:3
Consider him who endured such contrary talk by sinners against him. You should not get tired and give up in your mind (heart).

General references

Genesis 18:31
Abraham then said: Indeed now, I have taken it upon myself to speak to Jehovah: Suppose twenty should be found there? God replied: I will not destroy it for the sake of twenty.
Exodus 17:11
As long as Moses held up his hands, Israel would win, but as soon as he put his hands down, the Amalekites would start to win.
Luke 11:10
Every one who asks receives. Everyone who seeks will find. It will be opened to everyone who knocks.