Mark 7:21-22
for from within, from the hearts of men, proceed evil thoughts, fornications,
Matthew 10:33
and whoever denies me before men, him will I also deny before my Father in heaven.
Matthew 12:34-36
Offspring 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 lie to the Holy Spirit, and that you should keep back a part of the price of the land?
Romans 3:10-18
as it is written, There is none righteous not one,
Titus 1:16
They profess to know God, but by works deny him, being abominable and disobedient, and as to every good work reprobate.
Hebrews 3:12
See, brothers, that there be not at any time in any one of you an evil mind of unbelief in departing from the living God;
James 1:15
then the desire taking effect produces sin, and sin being finished brings forth death.
James 3:6
And the tongue is a fire, the tongue is made a world of wickedness among our members, it defiles the whole body and sets on fire the course of nature and is set on fire by hell.