G4645–σκληρύνω–sklērunō

But when some were hardened and disobedient, speaking evil of the Way before the multitude, he departed from them, and separated the disciples, reasoning daily in the school of Tyrannus.

ἐσκληρύνοντο esklērunonto “were hardened”

So then, he has mercy on whom he desires, and he hardens whom he desires.

σκληρύνει. sklērunei “He hardens.”

Don't harden your hearts, as in the provocation, Like as in the day of the trial in the wilderness,

σκληρύνητε sklērunēte “shall harden”

but exhort one another day by day, so long as it is called "today;" lest any one of you be hardened by the deceitfulness of sin.

σκληρυνθῇ sklērunthēa “may be hardened”

while it is said, "Today if you will hear his voice, Don't harden your hearts, as in the rebellion."

σκληρύνητε sklērunēte “shall harden”

he again defines a certain day, today, saying through David so long a time afterward (just as has been said), "Today if you will hear his voice, Don't harden your hearts."

σκληρύνητε sklērunēte “shall harden”