Matthew 12:34-35
Generation of vipers, how can you, being evil, speak good things? For out of the abundance of the heart, the mouth speaks.
Luke 6:45
The good man, out of the good treasury of his heart, brings forth that which is good; and the evil man, out of the evil treasury of his heart, brings forth that which is evil. For out of the abundance of his heart his mouth speaks.
Matthew 15:19
For from the heart come evil reasonings, murders, adulteries, lewd actions, thefts, false testimonies, impious words.
Mark 7:21-23
For from within, out of the heart of men, proceed the purposes which are evil: adulteries, lewd actions, murders,
Mark 14:38
Watch, and pray, all of you, lest you enter into temptation. The spirit indeed is willing, but the flesh is weak.
Hebrews 12:15
taking care, lest any one slight the grace of God; lest any root of bitterness spring up and trouble you, and by this many be defiled;
James 1:14-15
But every one is tempted when he is drawn away by his own desire, and is deluded.