1 Bible Verses about Apostasy in OT

which is imply'd by, "to-day since ye hear his voice, harden not your hearts, as at Meriba." for some when they had heard his voice, did provoke him: however, not all that were brought out of Egypt by Moses did so. but with whom was he displeased forty years? was it not with those that had sinned, whose carcases fell in the desert?read more.
and who were they, who, he sware, should not enter into his rest, but those that did not believe? so we see that they could not enter in, because of their incredulity.