Mark 7:21-22
From within, from the heart of man, the designs of evil come: sexual vice, stealing, murder,
Matthew 10:33
and whoever will disown me before men, I will disown him before my Father in heaven.
Matthew 12:34-36
You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.
Acts 5:3-4
"Ananias," said Peter, "why has Satan filled your heart and made you cheat the holy Spirit by appropriating some of the money paid for the land?
Titus 1:16
They profess to know God, but they deny him by their deeds; they are detestable, disobedient, and useless for good work of any kind.
Hebrews 3:12
Brothers, take care in case there is a wicked, unbelieving heart in any of you, moving you to apostatize from the living God.
James 1:15
then Desire conceives and breeds Sin, while Sin matures and gives birth to Death.
James 3:6
And the tongue is a fire, the tongue proves a very world of mischief among our members, staining the whole of the body and setting fire to the round circle of existence with a flame fed by hell.