Exodus 20:19-21

Young's Literal Translation

¹⁹ and say unto Moses, `Speak thou with us, and we hear, and let not God speak with us, lest we die.'

²⁰ And Moses saith unto the people, `Fear not, for to try you hath God come, and in order that His fear may be before your faces -- that ye sin not.'

²¹ And the people stand afar off, and Moses hath drawn nigh unto the thick darkness where God [is].