Hebrews 12:25-29

25See that ye refuse not him that speaketh. For if they escaped not when they refused him that warned them on earth, much more shall not we escape who turn away from him that warneth from heaven: 26whose voice then shook the earth: but now he hath promised, saying, Yet once more will I make to tremble not the earth only, but also the heaven. 27And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that have been made, that those things which are not shaken may remain. 28Wherefore, receiving a kingdom that cannot be shaken, let us have grace, whereby we may offer service well-pleasing to God with reverence and awe: 29for our God is a consuming fire.