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 21:18

21:18 If a person has a stubborn, rebellious son who pays no attention to his father or mother, and they discipline him to no avail, ² 

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

² tn Heb “and he does not listen to them.”