Therefore since it still remains for some to enter that rest, and since those who formerly had the good news proclaimed to them did not go in because of their disobedience, ⁷ God again set a certain day, calling it “Today.” This he did when a long time later he spoke through David, as in the passage already quoted:  “Today, if you hear his voice, do not harden your hearts.”

(Hebrews 4:6-7 -- NIV)