And he told them a parable to the effect that they ought always to pray and not lose heart.
1 Corinthians 15:58
Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain.
Put on the whole armor of God, that you may be able to stand against the schemes of the devil. For we do not wrestle against flesh and blood, but…against the spiritual forces of evil in the heavenly places.
Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand firm.
… praying at all times in the Spirit, with all prayer and supplication. To that end keep alert with all perseverance, making supplication for all the saints …
Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us …
… looking to Jesus, the founder and perfecter of our faith, who for the joy that was set before him endured the cross, despising the shame, and is seated at the right hand of the throne of God.
Count it all joy, my brothers, when you meet trials of various kinds, for you know that the testing of your faith produces steadfastness.
And let steadfastness have its full effect, that you may be perfect and complete, lacking in nothing.