Hebrews 3:7, 13, 15
Hebrews 3:13 ESV
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.
Hebrews 3:15 ESV
As it is said, “Today, if you hear his voice, do not harden your hearts as in the rebellion.”