Mark.6.52  for they did not understand about the loaves, but their hearts were hardened.
Mark.8.17  And being aware of it, Jesus said to them, "Why do you discuss the fact that you have no bread? Do you not yet perceive or understand? Are your hearts hardened?
John.12.40  "He has blinded their eyes and hardened their heart, lest they should see with their eyes and perceive with their heart, and turn for me to heal them."
Rom.9.18  So then he has mercy upon whomever he wills, and he hardens the heart of whomever he wills.
Rom.11.7  What then? Israel failed to obtain what it sought. The elect obtained it, but the rest were hardened,
Rom.11.25  Lest you be wise in your own conceits, I want you to understand this mystery, brethren: a hardening has come upon part of Israel, until the full number of the Gentiles come in,
2Cor.3.14  But their minds were hardened; for to this day, when they read the old covenant, that same veil remains unlifted, because only through Christ is it taken away.
Heb.3.8  do not harden your hearts as in the rebellion, on the day of testing in the wilderness,
Heb.3.13  But exhort one another every day, as long as it is called "today," that none of you may be hardened by the deceitfulness of sin.
Heb.3.15  while it is said, "Today, when you hear his voice, do not harden your hearts as in the rebellion."
Heb.4.7  again he sets a certain day, "Today," saying through David so long afterward, in the words already quoted, "Today, when you hear his voice, do not harden your hearts."