Hebrews 12:25-28

25 See that you don't refuse him who speaks. For if they didn't escape when they refused him who warned on the Earth, how much more will we not escape who turn away from him who warns from heaven,  26 whose voice shook the earth, then, but now he has promised, saying, "Yet once more I will shake not only the earth, but also the heavens."  27 This phrase, "Yet once more," signifies the removing of those things that are shaken, as of things that have been made, that those things which are not shaken may remain.  28 Therefore, receiving a kingdom that can't be shaken, let us have grace, through which we serve God acceptably, with reverence and awe,