Luke 2:35

(and even a sword shall go through thine own soul;) so that the thoughts may be revealed from many hearts.

John 19:25

And by the cross of Jesus stood his mother, and the sister of his mother, Mary the wife of Clopas, and Mary of Magdala.

Deuteronomy 8:2

And thou shalt remember all the way which Jehovah thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thy heart, whether thou wouldest keep his commandments or not.

Judges 5:15-16

the princes of Is'sachar came with Deb'orah, and Is'sachar faithful to Barak; into the valley they rushed forth at his heels. Among the clans of Reuben there were great searchings of heart.

Psalm 42:10

As with a crushing in my bones mine adversaries reproach me, while they say unto me all the day, Where is thy God?

Matthew 12:24-35

But the Pharisees, having heard it, said, This man does not cast out demons, but by Beelzebub, prince of demons.

Luke 16:14-15

And the Pharisees also, who were covetous, heard all these things, and mocked him.

John 8:42-47

Jesus said to them, If God were your father ye would have loved me, for I came forth from God and am come from him; for neither am I come of myself, but he has sent me.

John 15:22-24

If I had not come and spoken to them, they had not had sin; but now they have no excuse for their sin.

Acts 8:21-23

Thou hast neither part nor lot in this matter, for thy heart is not upright before God.

1 Corinthians 11:19

For there must also be sects among you, that the approved may become manifest among you.

1 John 2:19

They went out from among us, but they were not of us; for if they had been of us, they would have surely remained with us, but that they might be made manifest that none are of us.

Treasury of Scripture Knowledge

Summary

(Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.

Bible References

A sword

Psalm 42:10
As with a crushing in my bones mine adversaries reproach me, while they say unto me all the day, Where is thy God?
John 19:25
And by the cross of Jesus stood his mother, and the sister of his mother, Mary the wife of Clopas, and Mary of Magdala.

That

Luke 16:14
And the Pharisees also, who were covetous, heard all these things, and mocked him.
Deuteronomy 8:2
And thou shalt remember all the way which Jehovah thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thy heart, whether thou wouldest keep his commandments or not.
Judges 5:15
the princes of Is'sachar came with Deb'orah, and Is'sachar faithful to Barak; into the valley they rushed forth at his heels. Among the clans of Reuben there were great searchings of heart.
Matthew 12:24
But the Pharisees, having heard it, said, This man does not cast out demons, but by Beelzebub, prince of demons.
John 8:42
Jesus said to them, If God were your father ye would have loved me, for I came forth from God and am come from him; for neither am I come of myself, but he has sent me.
John 15:22
If I had not come and spoken to them, they had not had sin; but now they have no excuse for their sin.
Acts 8:21
Thou hast neither part nor lot in this matter, for thy heart is not upright before God.
1 Corinthians 11:19
For there must also be sects among you, that the approved may become manifest among you.
1 John 2:19
They went out from among us, but they were not of us; for if they had been of us, they would have surely remained with us, but that they might be made manifest that none are of us.