Hebrews 3:13 in the King James Version
But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.
Context
12 Beware, brothers, lest perhaps there might be in any one of you an evil heart of unbelief, in falling away from the living God;
13 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.
14 For we have become partakers of Christ, if we hold the beginning of our confidence firm to the end,