Deuteronomy 4:23-24 New International Version (NIV)

23 Be careful not to forget the covenant of the Lord your God that he made with you; do not make for yourselves an idol in the form of anything the Lord your God has forbidden. 24 For the Lord your God is a consuming fire, a jealous God.

Hebrews 12:28-29 New International Version (NIV)

28 Therefore, since we are receiving a kingdom that cannot be shaken,let us be thankful, and so worship God acceptably with reverence and awe, 29 for our “God is a consuming fire.”[a]