James 4:2-3
"...Yet you do not have because you do not ask. You ask and do not receive, because you ask amiss, that you may spend it on your pleasures."
Mark 10:47-48, 51-52
When he heard that it was Jesus of Nazareth, he began to shout, "Jesus, Son of David, have mercy on me!" Many rebuked him and told him to be quiet, but he shouted all the more, "Son of David, have mercy on me!"
...
"What do you want me to do for you?" Jesus asked him.
The blind man said, "Rabbi, I want to see."
"Go," said Jesus, "your faith has healed you." Immediately he received his sight and followed Jesus along the road.
Luke 18:1
Then He spoke a parable to them, that men always ought to pray and not lose heart...