Luke 11:5-8

"And Jesus said unto them,

Which of you shall have a friend, and shall go unto him at midnight, and say unto him, Friend, lend me three loaves;

For a friend of mine in his journey is come to me, and I have nothing to set before him?

And he from within shall answer and say, Trouble me not: the door is now shut, and my children are with me in bed; I cannot rise and give thee.

I say unto you, Though he will not rise and give him, because he is his friend, yet because of his importunity he will rise and give him as many as he needeth."

"According to Jesus, by far the most important thing about
praying is to keep at it... Be importunate, Jesus says--not,
one assumes, because you have to beat a path to God's door
before he'll open it, but because until you beat the path
maybe there's no way of getting to your door."
Frederick Buechner