"The sin of Judah is written with an iron stylus, engraved with a diamond point on the tablets of their hearts and on the horns of their altars.

2 Corinthians 3:3
It is clear that you are a letter from Christ, the result of our ministry, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts.

Job 19:24
by an iron stylus on lead, or chiseled in stone forever.

Proverbs 3:3
Never let loving devotion or faithfulness leave you; bind them around your neck, write them on the tablet of your heart.

Proverbs 7:3
Tie them to your fingers; write them on the tablet of your heart.

Isaiah 49:16
Behold, I have inscribed you on the palms of My hands; your walls are ever before Me.

Jeremiah 2:22
Although you wash with lye and use an abundance of soap, the stain of your guilt is still before Me," declares the Lord GOD.

Jeremiah 4:14
Wash the evil from your heart, O Jerusalem, so that you may be saved. How long will you harbor wicked thoughts within you?

Hosea 7:2
But they fail to consider in their hearts that I remember all their evil. Now their deeds are all around them; they are before My face.

Zechariah 7:12
They made their hearts like flint and would not listen to the law or to the words that the LORD of Hosts had sent by His Spirit through the earlier prophets. Therefore great anger came from the LORD of Hosts.

The sin of Judah is written with a pen of iron, and with the point of a diamond: it is graven on the table of their heart, and on the horns of your altars;