Hebrews 12:25-26

25Be careful that you do not refuse to listen when God speaks. Your ancestors didn’t escape when they refused to listen to God, who warned them on earth. We certainly won’t escape if we turn away from God, who warns us from heaven.

26When God spoke to your ancestors, his voice shook the earth. But now he has promised, “Once more I will shake not only the earth but also the sky.”