Hebrews 3:18-4:1 And to whom sware he that they should not enter into his rest, but to those who had not hearkened to the word?

Darby⁽ⁱ⁾ ¹⁸ And to whom sware he that they should not enter into his rest, but to those who had not hearkened to the word? ¹⁹ And we see that they could not enter in on account of unbelief;) ⁴ ¹ Let us therefore fear, lest, a promise being left of entering into his rest, any one of you might seem to have failed [of it].