Hebrews 2:3
how shall we escape who have neglected so great a salvation? which began to be spoken by the Lord, and was affirmed to us by those who heard,
Hebrews 6:6
and having fallen away, it is impossible again to renew to a change of mind, they having crucified again and exposed to shame the Son of God.
Hebrews 9:28
so also Christ having been once offered to bear the sins of many, shall appear a second time without sin, to those who look for him for salvation.
Hebrews 10:26-29
For if we sin willingly after having received the knowledge of the truth, there is no longer a sacrifice left for sins,
Hebrews 12:25
See that you refuse not him that speaks; for if they did not escape who refused him that gave answers on earth, much more shall we [not escape] who turn ourselves away from him in heaven;