Matthew 15:8
"'This people honor me with their lips, but their hearts are far, far away from me;
John 1:47
Jesus saw Nathaniel coming toward Him, and said of him, "Here is a genuine Israelite with no deceit in him!"
Acts 8:21
You have no share or part in this matter, for your heart is not sincere in the sight of God.
Hebrews 3:12
See to it, my brothers, that no wicked, unbelieving heart is found in any of you, as shown by your turning away from the ever-living God,
1 Peter 3:10
For "Whoever wants to enjoy life and see delightful days must keep his tongue from evil and his lips from speaking deceit.