Matthew 13:21
but since he has such a shallow root, he lasts for [only] a short while. Then when trouble or persecution comes because of the message, immediately he falls away [from God].
Luke 18:1
Then Jesus told His disciples a parable for the purpose of showing them that they should pray continually and not become discouraged.
Acts 10:2
He was very devoted [to his religious principles] and had great respect for God, along with the members of his household. He gave [money] liberally to poor people and prayed to God regularly.
Ephesians 6:18
[Then] offer all kinds of prayers and requests in [harmony with] the Holy Spirit at all times, and be alert constantly in making requests for all the saints [i.e., God's holy people].
1 Thessalonians 5:17
Never stop praying.