Hebrews 4:7-9

7again he determines a certain day, saying, in David, 'To-day,' after so long a time; (according as it has been said before), To-day, if ye will hear his voice, harden not your hearts.

8For if Jesus had brought them into rest, he would not have spoken afterwards about another day.

9There remains then a sabbatism to the people of 1God.