do not harden your hearts as in the rebellion, on the day of testing in the wilderness,

Therefore I was provoked with that generation, and said, ‘They always go astray in their heart; they have not known my ways.’

Take care, brothers, lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God.

As it is said, “Today, if you hear his voice, do not harden your hearts as in the rebellion.”

again he appoints a certain day, “Today,” saying through David so long afterward, in the words already quoted, “Today, if you hear his voice, do not harden your hearts.”

For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.

For this is the covenant that I will make with the house of Israel after those days, declares the Lord: I will put my laws into their minds, and write them on their hearts, and I will be their God, and they shall be my people.

“This is the covenant that I will make with them after those days, declares the Lord: I will put my laws on their hearts, and write them on their minds,”

let us draw near with a true heart in full assurance of faith, with our hearts sprinkled clean from an evil conscience and our bodies washed with pure water.

Do not be led away by diverse and strange teachings, for it is good for the heart to be strengthened by grace, not by foods, which have not benefited those devoted to them.