23 (5:20) And it came to pass, when ye heard the voice out of the midst of the darkness, while the mountain did burn with fire, that ye came near unto me, even all the heads of your tribes, and your elders;
Deuteronomy 5:23 Cross References - JPS_ASV_Byz
Exodus 20:18-19
18 (20:15) And all the people perceived the thunderings, and the lightnings, and the voice of the horn, and the mountain smoking; and when the people saw it, they trembled, and stood afar off.
19 (20:16) And they said unto Moses: 'Speak thou with us, and we will hear; but let not God speak with us, lest we die.'
Hebrews 12:18-21
18 For ye are not come unto a mount that might be touched, and that burned with fire, and unto blackness, and darkness, and tempest,
19 and the sound of a trumpet, and the voice of words, which voice they that heard entreated that no word more should be spoken unto them,
20 for they could not endure that which was enjoined, If even a beast touch the mountain, it shall be stoned,
21 and so fearful was the appearance, that Moses said, I exceedingly fear and quake: