Matthew 23:28

So also you on the outside appear just to men, but within you are full of hypocrisy and wickedness.

Matthew 23:5

And they do all their works to be seen by men. For they make broad their prayer fillets, and enlarge the fringes,

Matthew 12:34-35

Offspring of vipers, how can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.

Matthew 15:19-20

For from the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies:

Mark 7:21-23

for from within, from the hearts of men, proceed evil thoughts, fornications,

Luke 16:15

And he said to them, You are they that justify yourselves before men; but God knows your hearts; for that which is high among men is an abomination before God.

Hebrews 4:12-13

For the word of God is living, and effective, and sharper than any two-edged sword, and reaching even to the division of soul and spirit, and of joints and marrows, and distinguishes thoughts and intentions of mind;

Treasury of Scripture Knowledge

Summary

Even so ye also outwardly appear righteous unto men, but within ye are full of hypocrisy and iniquity.

Bible References

Ye also

Matthew 23:5
And they do all their works to be seen by men. For they make broad their prayer fillets, and enlarge the fringes,
Luke 16:15
And he said to them, You are they that justify yourselves before men; but God knows your hearts; for that which is high among men is an abomination before God.
Hebrews 4:12
For the word of God is living, and effective, and sharper than any two-edged sword, and reaching even to the division of soul and spirit, and of joints and marrows, and distinguishes thoughts and intentions of mind;

But

Matthew 12:34
Offspring of vipers, how can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
Matthew 15:19
For from the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies:
Mark 7:21
for from within, from the hearts of men, proceed evil thoughts, fornications,