2 Corinthians 3:3

Ezekiel 11:19 NIV
I will give them an undivided heart and put a new spirit in them; I will remove from them their heart of stone and give them a heart of flesh.

Hebrews 8:10 NIV
This is the covenant I will establish with the people of Israel after that time, declares the Lord. I will put my laws in their minds and write them on their hearts. I will be their God, and they will be my people.

Jeremiah 31:33 NIV
“This is the covenant I will make with the people of Israel after that time,” declares the Lord. “I will put my law in their minds and write it on their hearts. I will be their God, and they will be my people.