Hebrews 4:1; Hebrews 4:6-8

1 Therefore, while the promise remains of entering His rest, let us fear so that none of you should miss it.
6 Since it remains for some to enter it, and those who formerly received the good news did not enter because of disobedience, 7 again, He specifies a certain day- today -speaking through David after such a long time, as previously stated: Today if you hear His voice, do not harden your hearts. 8 For if Joshua had given them rest, He would not have spoken later about another day.