Therefore, while the promise of entering his rest is still open, let us take care that none of you should seem to have failed to reach it.
For indeed the good news came to us just as to them; but the message they heard did not benefit them, because they were not united by faith with those who listened.
References for Hebrews 4:2
For we who have believed enter that rest, just as God has said, "As in my anger I swore, "They shall not enter my rest,' " though his works were finished at the foundation of the world.
References for Hebrews 4:3
For in one place it speaks about the seventh day as follows, "And God rested on the seventh day from all his works."
And again in this place it says, "They shall not enter my rest."
Since therefore it remains open for some to enter it, and those who formerly received the good news failed to enter because of disobedience,
again he sets a certain day—"today"—saying through David much later, in the words already quoted, "Today, if you hear his voice, do not harden your hearts."
For if Joshua had given them rest, God would not speak later about another day.
References for Hebrews 4:8
So then, a sabbath rest still remains for the people of God;
for those who enter God's rest also cease from their labors as God did from his.
Let us therefore make every effort to enter that rest, so that no one may fall through such disobedience as theirs.
Indeed, the word of God is living and active, sharper than any two-edged sword, piercing until it divides soul from spirit, joints from marrow; it is able to judge the thoughts and intentions of the heart.
And before him no creature is hidden, but all are naked and laid bare to the eyes of the one to whom we must render an account.
Since, then, we have a great high priest who has passed through the heavens, Jesus, the Son of God, let us hold fast to our confession.
For we do not have a high priest who is unable to sympathize with our weaknesses, but we have one who in every respect has been tested as we are, yet without sin.
References for Hebrews 4:15
Let us therefore approach the throne of grace with boldness, so that we may receive mercy and find grace to help in time of need.