Philippians 2:12
So, my beloved brethren, as you have always harkened, not only in my presence, but now much more in my absence, work out your own salvation with fear and trembling;
Hebrews 4:1-2
Then let us fear, lest at some time, the promise to enter into his rest having been left, some of you may appear to have come short.
Hebrews 12:25
See that you do not reject the one speaking: for if they escape not having rejected the one delivering them the divine oracles on earth, how much more shall we not escape, who turn away from the one speaking from the heavens:
Hebrews 12:28-29
Therefore receiving an unshaken kingdom, let us have grace, through which we may worship God acceptably with reverence and fear: