Hebrews 12:19
“And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more:”
For ye know how that afterward, when he would have inherited the blessing, he was rejected: for he found no place of repentance, though he sought it carefully with tears.
For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest,
And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more:
(For they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart:
And so terrible was the sight, that Moses said, I exceedingly fear and quake:)
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“According to all that thou desiredst of the Lord thy God in Horeb in the day of the assembly, saying, Let me not hear again the voice of the Lord my God, neither let me see this great fire any more, that I die not.”
“According to all that thou desiredst of the Lord thy God in Horeb in the day of the assembly, saying, Let me not hear again the voice of the Lord my God, neither let me see this great fire any more, that I die not.”
“And ye said, Behold, the Lord our God hath shewed us his glory and his greatness, and we have heard his voice out of the midst of the fire: we have seen this day that God doth talk with man, and he liveth.”
“For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:”
“The Lord made not this covenant with our fathers, but with us, even us, who are all of us here alive this day.”