Luke 18:1
"And he spake a parable unto them to this end, that men ought always to pray, and not to faint;"
Cross References (ranked by relevance)
Continue in prayer, and watch in the same with thanksgiving;
Rejoicing in hope; patient in tribulation; continuing instant in prayer;
Pray without ceasing.
Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.
Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;
Then shall ye call upon me, and ye shall go and pray unto me, and I will hearken unto you.
Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.
And let us not be weary in well doing: for in due season we shall reap, if we faint not.
Be merciful unto me, O Lord: for I cry unto thee daily.
He will regard the prayer of the destitute, and not despise their prayer.
Therefore seeing we have this ministry, as we have received mercy, we faint not;
Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.
O thou that hearest prayer, unto thee shall all flesh come.
When my soul fainted within me I remembered the LORD: and my prayer came in unto thee, into thine holy temple.
I had fainted, unless I had believed to see the goodness of the LORD in the land of the living.