Deuteronomy 4:10-12 Amplified Bible, Classic Edition (AMPC)
10 Especially how on the day that you stood before the Lord your God in Horeb, the Lord said to me, Gather the people together to Me and I will make them hear My words, that they may learn [reverently] to fear Me all the days they live upon the earth and that they may teach their children.
11 And you came near and stood at the foot of the mountain, and the mountain burned with fire to the heart of heaven, with darkness, cloud, and thick gloom.
12 And the Lord spoke to you out of the midst of the fire. You heard the voice of the words, but saw no form; there was only a voice.
Deuteronomy 4:10-12 New International Version (NIV)
10 Remember the day you stood before the Lord your God at Horeb, when he said to me, “Assemble the people before me to hear my words so that they may learn to revere me as long as they live in the land and may teach them to their children.” 11 You came near and stood at the foot of the mountain while it blazed with fire to the very heavens, with black clouds and deep darkness. 12 Then the Lord spoke to you out of the fire. You heard the sound of words but saw no form; there was only a voice.