Exodus 20:18-26 New King James Version (NKJV)
The People Afraid of God’s Presence
18 Now all the people witnessed the thunderings, the lightning flashes, the sound of the trumpet, and the mountain smoking; and when the people saw it, they trembled and stood afar off. 19 Then they said to Moses, “You speak with us, and we will hear; but let not God speak with us, lest we die.”
20 And Moses said to the people, “Do not fear; for God has come to test you, and that His fear may be before you, so that you may not sin.” 21 So the people stood afar off, but Moses drew near the thick darkness where God was.
The Law of the Altar
22 Then the Lord said to Moses, “Thus you shall say to the children of Israel: ‘You have seen that I have talked with you from heaven. 23 You shall not make anything to be with Me—gods of silver or gods of gold you shall not make for yourselves. 24 An altar of earth you shall make for Me, and you shall sacrifice on it your burnt offerings and your peace offerings, your sheep and your oxen. In every place where I [a]record My name I will come to you, and I will bless you. 25 And if you make Me an altar of stone, you shall not build it of hewn stone; for if you use your tool on it, you have profaned it. 26 Nor shall you go up by steps to My altar, that your nakedness may not be exposed on it.’
Deuteronomy 5:25 New King James Version (NKJV)
25 Now therefore, why should we die? For this great fire will consume us; if we hear the voice of the Lord our God anymore, then we shall die.
Deuteronomy 18:16 New King James Version (NKJV)
16 according to all you desired of the Lord your God in Horeb in the day of the assembly, saying, ‘Let me not hear again the voice of the Lord my God, nor let me see this great fire anymore, lest I die.’