Matthew 13:21
Yet hath he not root in himself, and so endureth but for a while: for when tribulation or persecution ariseth because of the word, straight-way he is offended.
Luke 18:1
And he spake a parable to them to this end, that they ought always to pray, and not to faint;
Acts 10:2
A devout man, and fearing God with all his house, who gave much alms to the people, and prayed to God alway.
Ephesians 6:18
which is the word of God, Praying alway by the Spirit with all prayer and supplication, and watching thereunto with all perseverance and supplication for all the saints,
1 Thessalonians 5:17
Pray without ceasing: In every thing give thanks;