Deuteronomy 4:12

4:12 Then the Lord spoke to you from the middle of the fire; you heard speech but you could not see anything – only a voice was heard. ¹ 

Deuteronomy 4:36

4:36 From heaven he spoke to you in order to teach you, and on earth he showed you his great fire from which you also heard his words. ² 

[4:12]  ¹ tn The words “was heard” are supplied in the translation to avoid the impression that the voice was seen.

[4:36]  ² tn Heb “and his words you heard from the midst of the fire.”