Luke 18:1

And he spake to them a parable, that they must always pray, and not lose courage;

Colossians 4:2

In prayer persevere, watching in it in gratitude

Romans 12:12

Rejoicing in hope; holding out under pressure; persevering in prayer;

Ephesians 6:18

By all prayer and supplication praying in all time in Spirit, and for this same watching vigilantly in all perseverance and supplication for the holy:

1 Thessalonians 5:17

Pray continually.

Philippians 4:6

Rave anxiety about nothing; but in every thing by prayer and supplication with gratitude let your desires be made known to God.

Psalm 55:16-17

I will call upon God, and Jehovah will save me:

Luke 21:36

Watch therefore, in all time praying, that ye be deemed worthy to escape all these about to be, and to stand before the Son of man.

Genesis 32:24-26

And Jacob will be left alone by himself, and a man will wrestle with him till the ascending of the morning.

Job 27:8-10

For what the hope of the profane one if he shall plunder? for God shall draw out his soul.

Psalm 27:13

Unless I believed to look upon the goodness of Jehovah in the land of the living.

Psalm 65:2

Hear thou prayer: even to thee shall all flesh come.

Psalm 86:3

Compassionate me, O Jehovah, for to thee I will call all the day.

Psalm 102:17

He looked upon the prayer of the helpless, and he despised not their prayer.

Genesis 32:9-12

And Jacob will say, God of my father Abraham, and God of my father Isaak, Jehovah having said to me, Turn back to thy land and to thy family, and I will do well with thee.

Psalm 142:5-7

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

Jeremiah 29:12

And ye called me, and went and prayed to me, and I heard to you.

Jonah 2:7

In my soul fainting upon me I remembered Jehovah: and my prayers will come in to thee to thy holy temple.

Luke 11:5-9

And he said to them, Which. of you shall have a friend, and shall-go to him at midnight, and should say to him, Friend, lend me three loaves;

2 Corinthians 4:1

For this, having this service, as we were compassionated, we lose not courage;

Galatians 6:9

And doing good let us not despond: for in proper time we shall reap, not being enervated.

Colossians 4:12

Epaphras, who of you, greets you, a servant of Christ, always contending for you in prayers, that ye may stand perfected and completed in all the will of God.

Hebrews 12:3-5

For reckon over him having endured such contradiction of the sinful against himself, lest being harassed, ye labor in your souls.

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
Unless I believed to look upon the goodness of Jehovah in the land of the living.
Jonah 2:7
In my soul fainting upon me I remembered Jehovah: and my prayers will come in to thee to thy holy temple.
Galatians 6:9
And doing good let us not despond: for in proper time we shall reap, not being enervated.
Hebrews 12:3
For reckon over him having endured such contradiction of the sinful against himself, lest being harassed, ye labor in your souls.

General references

Genesis 18:31
And he will say, Behold now, I have begun to speak to the Lord If twenty shall be found there? And he will say, I will not destroy for sake of twenty.
Exodus 17:11
And it was as Moses will lift up his hand, Israel prevailed: and as he will put down his hand and Amalek prevailed.
Luke 11:10
For every one asking, receives; and he seeking, finds; and to him knocking, it shall be opened. .