Matthew 15:22-28
And behold, a woman of Canaan from those regions came out and cried, saying, Have mercy on me, Lord, Son of David; my daughter is badly affected with a demon.
Matthew 26:41
Watch and pray that you enter not into trial; the spirit indeed is willing, but the flesh is weak.
Matthew 26:44
And leaving them, again he went away and prayed, saying the same words.
Luke 11:5-8
And he said to them, Which of you shall have a friend, and go to him at midnight, and say, Friend, lend me three loaves,
2 Corinthians 12:7-9
And that I might not be elated with my extraordinary revelations, there was given me a thorn in the flesh, an angel of Satan to beat me, that I should not be too much exalted.