Matthew 12:34-35
You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
Luke 6:45
The good man out of the good treasure of his heart brings forth good, and an evil man out of the evil treasure of his heart brings forth evil. For out of the abundance of the heart his mouth speaks.
Matthew 15:19
For out of the heart come evil thoughts, murder, adultery, fornications, theft, false witness, slander.
Mark 7:21-23
For from within, out of the heart of men, come evil thoughts, fornications, theft, murder, adultery,
Mark 14:38
Watch and pray that you may not enter into temptation. The spirit indeed is willing, but the flesh is weak."
Hebrews 12:15
See to it that no one comes short of the grace of God; that no root of bitterness spring up and cause trouble, and by it many become defiled;
James 1:14-15
But each one is tempted when he is carried away and enticed by his own desire.