Hebrews 12:26-28 NIV

26 At that time his voice shook the earth,1 but now he has promised, "Once more I will shake not only the earth but also the heavens."a2

References for Hebrews 12:26

27 The words "once more" indicate the removing of what can be shaken3--that is, created things--so that what cannot be shaken may remain.

References for Hebrews 12:27

28 Therefore, since we are receiving a kingdom that cannot be shaken,4 let us be thankful, and so worship God acceptably with reverence and awe,5

References for Hebrews 12:28