Apostol § 308

Brethren, Moses indeed was faithful in all His house as a servant, for a testimony of those things which would be spoken afterward, but Christ as a Son over His own house, whose house we are, if we hold fast the confidence and the rejoicing of the hope firm unto the end. Therefore, as the Holy Spirit says: “Today, if you will hear His voice, do not harden your hearts as in the rebellion, in the day of temptation in the wilderness, when your fathers tempted Me, proved Me, and saw My works forty years. Therefore I was grieved with that generation, and said, ‘They do always err in their heart, and they have not known My ways.’ So I swore in My wrath, ‘They shall not enter into My rest…’ ” But with whom was He grieved for forty years? Was it not with them that had sinned, whose corpses fell in the wilderness? And to whom did He swear that they would not enter into His rest, but to them that did not obey? So we see that they could not enter in because of unbelief.