Hebrews 3:7-19 - A Serious Warning Against Unbelief
7 Therefore, as the holy Spirit says, "If you hear his voice today, 8 Do not harden your hearts as your forefathers provoked me by doing, As in that time of trial in the desert, 9 Where your forefathers put my doings to the proof for forty years, Though they saw them all the time. 10 That was why I was angry with that generation, And I said, 'Their minds are always wandering, And they have never found my paths.' 11 But as I made oath in my anger, They shall never be admitted to my Rest!"
12 See to it, my brothers, that no one of you has a wicked, unbelieving heart, that turns away from the ever-living God, 13 but encourage one another every day, as long as we can still speak of Today, so that no one of you may have his heart hardened by the pleasantness of sin. 14 For we are true partners with Christ if we really keep the conviction that we had at first unshaken to the very end. 15 So while we can still speak of Today, if you hear him speak, do not harden your hearts, as they provoked him by doing.
16 For who was it that heard him speak and yet provoked him? Was it not all those who had escaped from Egypt under Moses' leadership? 17 And who was it with whom God was angry forty whole years? Was it not with those who had sinned, who dropped dead in the desert? 18 And who was it to whom God made oath that they should not be admitted to his Rest, if it was not to those who had disobeyed him? 19 So we see that it was their unbelief that kept them from being admitted to it.