Heb 3:15 While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
Heb 3:16 For some, when they had heard, did provoke: howbeit not all that came out of Egypt by Moses.
Heb 3:17 But with whom was he grieved forty years? was it not with them that had sinned, whose carcases fell in the wilderness?
Heb 3:18 And to whom sware he that they should not enter into his rest, but to them that believed not?
Heb 3:19 So we see that they could not enter in because of unbelief.
Heb_4:11 Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.