Hebrews 3:18 in the King James Version
And to whom sware he that they should not enter into his rest, but to them that believed not?
Context
17 With whom was he displeased forty years? Wasn’t it with those who sinned, whose bodies fell in the wilderness?
18 To whom did he swear that they wouldn’t enter into his rest, but to those who were disobedient?
19 We see that they weren’t able to enter in because of unbelief.