Hebrews 4:5-7

5and again in this, “They shall not enter My rest.”

6Therefore, since the promise remains for some to enter His rest, and those who formerly had the good news preached to them failed to [grasp it and did not] enter because of [their unbelief evidenced by] disobedience,

7He again sets a definite day, [a new] “Today,” [providing another opportunity to enter that rest by] saying through David after so long a time, just as has been said before [in the words already quoted], “Today if you hear His voice, Do not harden your hearts.”