Deuteronomy 4:15

15 and ye have been very watchful of your souls, for ye have not seen any similitude in the day of Jehovah's speaking unto you in Horeb out of the midst of the fire,

Deuteronomy 4:15 Meaning and Commentary

Deuteronomy 4:15

Take ye therefore good heed unto yourselves
As to keep all the laws given them, so particularly to avoid idolatry:

for ye saw no manner of similitude on the day the Lord spake unto you
in Horeb out of the midst of the fire;
and therefore, as they had nothing that directed and led them, so they had nothing that could be a temptation to them, to make any form or likeness, and worship it.

Deuteronomy 4:15 In-Context

13 and He declareth to you His covenant, which He hath commanded you to do, the Ten Matters, and He writeth them upon two tables of stone.
14 `And me hath Jehovah commanded at that time to teach you statutes and judgments, for your doing them in the land whither ye are passing over to possess it;
15 and ye have been very watchful of your souls, for ye have not seen any similitude in the day of Jehovah's speaking unto you in Horeb out of the midst of the fire,
16 lest ye do corruptly, and have made to you a graven image, a similitude of any figure, a form of male or female --
17 a form of any beast which [is] in the earth -- a form of any winged bird which flieth in the heavens --
Young's Literal Translation is in the public domain.