Matthew 15:8
"'This is a People who honour Me with their lips, while their heart is far away from Me;
John 1:47
Jesus saw Nathanael approaching, and said of him, "Look! here is a true Israelite, in whom there is no deceitfulness!"
Acts 8:21
No part or lot have you in this matter, for your heart is not right in God's sight.
Hebrews 3:12
see to it, brethren, that there is never in any one of you--as perhaps there may be--a sinful and unbelieving heart, manifesting itself in revolt from the ever-living God.
1 Peter 3:10
For "He who wishes to be well-satisfied with life and see happy days-- let him restrain his tongue from evil, and his lips from deceitful words;