Matthew 12:34-36
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.
Matthew 15:19
For out of the heart proceed wicked disputings, murders, adulteries, fornications, thefts, false-witnessings, slanders:
Matthew 23:13
But wo unto you scribes and pharisees, hypocrites, who shut up the kingdom of heaven against men: for ye neither go in yourselves, nor suffer those that are entering to go in.
Acts 5:3-4
But Peter said, Ananias, why hath Satan so filled thine heart, that thou shouldst lie to the holy Ghost, and keep back part of the price of the land?
Acts 8:21-22
Thou hast no part nor lot in this matter: for thy heart is not right in the sight of God.
James 1:14-15
But every man is tempted, when drawn aside and insnared by his own vehement desire.
James 1:27
Pure and uncorrupt religion before God and our Father is this, to take care of orphans and widows in their affliction, and to keep himself unspotted from the world.
James 3:5-6
So the tongue is a small part of the body, yet boasteth great things. Behold how much fuel a little fire kindleth!