Hebrews 3:12-15 (New International Version)

 ¹²See to it, brothers, that none of you has a sinful, unbelieving heart that turns away from the living God. ¹³But encourage one another daily, as long as it is called Today, so that none of you may be hardened by sin's deceitfulness. ¹⁴We have come to share in Christ if we hold firmly till the end the confidence we had at first. ¹⁵As has just been said:
   "Today, if you hear his voice,
      do not harden your hearts
   as you did in the rebellion."^[a]