Mark 7:21-22
For from within, out of the heart of men, proceed the purposes which are evil: adulteries, lewd actions, murders,
Matthew 10:33
But whoever will deny me before men, him will I also deny before my Father who is in heaven.
Matthew 12:34-36
Generation of vipers, how can you, being evil, speak good things? For out of the abundance of the heart, the mouth speaks.
Acts 5:3-4
But Peter said: Ananias, why has Satan filled your heart, that you should at tempt to deceive the Holy Spirit, and keep back part of the price of the land?
Romans 3:10-18
as it is written: There is none righteous, no, not one;
Titus 1:16
They profess that they know God, but in their works they deny him, being detestable and disobedient, and, as it respects every good work, rejected.
Hebrews 3:12
Take heed, brethren, lest there be in any of you an evil heart of unbelief in apostatizing from the living God.
James 1:15
So, then, desire, when it has conceived, brings forth sin; and sin, when it is matured, brings forth death.
James 3:6
And the tongue is a fire, the world of iniquity. So is the tongue placed among our members, defiling the whole body, setting on fire the course of life, and being set on fire by hell.