Act 19:9 But when some became stubborn and continued in unbelief, speaking evil of the Way before the congregation, he withdrew from them and took the disciples with him, reasoning daily in the hall of Tyrannus.
Rom 9:18 So then he has mercy on whomever he wills, and he hardens whomever he wills.

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 calledtoday,” that none of you may be hardened by the deceitfulness of sin.
Heb 3:15 As it is said,

Today, if you hear his voice,
do not harden your hearts as in the rebellion.”
Heb 4:7 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.”
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