1 Samuel 24:5
And it came to pass afterward that David's heart smote him because he had cut off Saul's skirt.
2 Samuel 24:10
And David's heart smote him after he had numbered the people. And David said unto the LORD, I have sinned greatly in having done this; but now, I beseech thee, O LORD, take away the iniquity of thy slave, for I have done very foolishly.
2 Samuel 12:9
Why, therefore, hast thou despised the commandment of the LORD, to do evil in his sight? Thou hast killed Uriah, the Hittite, with the sword and hast taken his wife to be thy wife and hast slain him with the sword of the sons of Ammon.
2 Kings 22:19
and thy heart became tender, and thou hast humbled thyself before the LORD when thou didst hear what I spoke against this place and against its inhabitants, that they should become desolate and cursed, and hast rent thy clothes and wept before me; I also have heard thee, saith the LORD.
1 John 3:20-21
And if our heart condemns us, God is greater than our heart and knows all things.