Matthew 12:34-35
O race of vipers, how can ye speak good things, who are yourselves so wicked? for out of the abundance of the heart the mouth speaketh.
Luke 6:45
A good man, out of the good treasure of his heart, bringeth forth that which is good; and an evil man, out of the evil treasure of his heart, bringeth forth that which is evil: for out of the abundance of the heart his mouth speaketh.
Matthew 15:19
For out of the heart proceed wicked disputings, murders, adulteries, fornications, thefts, false-witnessings, slanders:
Mark 7:21-23
for out of the heart of men proceed evil thoughts,
Mark 14:38
Watch, and pray, that ye enter not into temptation. The spirit indeed is willing, but the body is weak.
Hebrews 12:15
looking to it, least there be any one falling short of the grace of God, least any root of bitterness springing up should be troublesome, and by it many be defiled:
James 1:14-15
But every man is tempted, when drawn aside and insnared by his own vehement desire.