Hebrews 3:13

3:13 But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.

Hebrews 4:11

4:11 Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.

Hebrews 4:14

4:14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast [our] profession.

Hebrews 12:27

12:27 And this [word], Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain.