11 distinct Greek words appear in this verse.

1 variant unit attested by manuscript witnesses and modern critical editions.

2 passages from patristic writers, Reformers, and church catechisms citing this verse.

• Isa 63:17 — O LORD, why hast thou made us to err from thy ways, and hardened our heart from thy fear? Return for thy servants’ sake, the tribes of thine inheritance.
• John 12:40 — He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them.
• Luke 24:25 — Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:
• Mark 3:5 — And when he had looked round about on them with anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched it out: and his hand was restor
• Mark 7:18 — And he saith unto them, Are ye so without understanding also? Do ye not perceive, that whatsoever thing from without entereth into the man, it cannot defile him;
• Mark 8:4 — And his disciples answered him, From whence can a man satisfy these men with bread here in the wilderness?
• Mark 8:17 — And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?
• Mark 8:17 — And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?
• Mark 8:21 — And he said unto them, How is it that ye do not understand?
• Mark 16:14 — Afterward he appeared unto the eleven as they sat at meat, and upbraided them with their unbelief and hardness of heart, because they believed not them which had seen him after he was risen.
• Matt 15:16 — And Jesus said, Are ye also yet without understanding?
• Matt 16:9 — Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up?
• Rom 11:7 — What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded.