Deuteronomy 4:8-12

Or what great nation is there that has statutes and judgments as righteous as this whole Law which I am setting before you today?

“Only be careful for yourself and watch over your soul diligently, so that you do not forget the things which your eyes have seen and they do not depart from your heart all the days of your life; but make them known to your sons and your grandsons.

Remember the day you stood before the Lord your God at Horeb, when the Lord said to me, ‘Assemble the people to Me, that I may have them hear My words so that they may learn to fear Me all the days that they live on the earth, and that they may teach their children.’

You came forward and stood at the foot of the mountain, and the mountain was burning with fire to the heart of the heavens: darkness, cloud, and thick gloom.

Then the Lord spoke to you from the midst of the fire; you heard the sound of words, but you saw no form—there was only a voice.