Luke 18:1

And he also spoke a parable to them about it being necessary to always pray, and not to give up,

Colossians 4:2

Continue in prayer, being vigilant in it with thankfulness.

Romans 12:12

rejoicing in hope, enduring tribulation, persevering in prayer,

Ephesians 6:18

praying through every prayer and entreaty at every time in spirit, and being alert in this same thing in all perseverance and entreaty for all the sanctified,

1 Thessalonians 5:17

Pray without ceasing.

Philippians 4:6

Be anxious about nothing, but in everything by prayer and supplication with thankfulness make your requests known to God.

Psalm 55:16-17

As for me, I will call upon God, and LORD will save me.

Luke 21:36

Watch ye therefore, making supplication at all times, so that ye may be considered worthy to escape all these things going to happen, and to stand before the Son of man.

Genesis 32:24-26

And Jacob was left alone, and a man wrestled with him until the breaking of the day.

Job 27:8-10

For what is the hope of the profane, though he gets him gain, when God takes away his soul?

Psalm 27:13

I believe that I shall see the goodness of LORD in the land of the living.

Psalm 65:2

O thou who hear prayer, to thee all flesh shall come.

Psalm 86:3

Be merciful to me, O LORD, for to thee do I cry all the day long.

Psalm 102:17

He has regarded the prayer of the destitute, and has not despised their prayer.

Genesis 32:9-12

And Jacob said, O God of my father Abraham, and God of my father Isaac, O LORD, who said to me, Return to thy country, and to thy kindred, and I will do thee good,

Psalm 142:5-7

I cried to thee, O LORD. I said, Thou are my refuge, my portion in the land of the living.

Jeremiah 29:12

And ye shall call upon me, and ye shall go and pray to me, and I will hearken to you.

Jonah 2:7

When my soul fainted within me, I remembered LORD. And my prayer came in to thee, into thy holy temple.

Luke 11:5-9

And he said to them, Which of you will have a friend, and will go to him at midnight, and say to him, Friend, lend me three loaves,

2 Corinthians 4:1

Because of this (having this ministry), in as much as we received mercy, we do not become discouraged.

Galatians 6:9

And let us not be weary doing good, for in our own time we will reap, not desponding.

Colossians 4:12

Epaphras, the bondman of Christ from you, salutes you, always striving for you in prayers, so that ye may stand perfect and made full in all the will of God.

Hebrews 12:3-5

For consider the man who endured such hostility against him by sinners, so that ye may not be weary in your souls, being disheartened.

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 shall see the goodness of LORD in the land of the living.
Jonah 2:7
When my soul fainted within me, I remembered LORD. And my prayer came in to thee, into thy holy temple.
Galatians 6:9
And let us not be weary doing good, for in our own time we will reap, not desponding.
Hebrews 12:3
For consider the man who endured such hostility against him by sinners, so that ye may not be weary in your souls, being disheartened.

General references

Genesis 18:31
And he said, Behold now, I have taken upon me to speak to the Lord. Perhaps there shall be twenty found there. And he said, I will not destroy it for the twenty's sake.
Exodus 17:11
And it came to pass, when Moses held up his hand, that Israel prevailed, and when he let down his hand, Amalek prevailed.
Luke 11:10
For every man who asks receives, and he who seeks finds, and to him who knocks it will be opened.