Deuteronomy 4:15

“Take ye therefore good heed unto yourselves, etc.] 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.”

“A PARTICULAR DISSUASIVE AGAINST IDOLATRY. (Deu. 4:14-40) Take . . . good heed . . . for ye saw no manner of similitude--The extreme proneness of the Israelites to idolatry, from their position in the midst of surrounding nations already abandoned to its seductions, accounts for their attention being repeatedly drawn to the fact that God did not appear on Sinai in any visible form; and an earnest caution, founded on that remarkable circumstance, is given to beware, not only of making representations of false gods, but also any fancied representation of the true God.”

“In Horeb - God, who in other places and times did appear in a similitude in the fashion of a man, now in this most solemn appearance, when he comes to give eternal laws for the direction of the Israelites in the worship of God, and in their duty to men, purposely avoids all such representations, to shew that he abhors all worship of images, or of himself by images of what kind soever, because he is the invisible God, and cannot be represented by any visible image. Deuteronomy 4:16”

“4:15 form: No image could capture the transcendent glory and power of the invisible God (Neh 9:20; Isa 63:10-14; Zech 4:6; John 4:24). Any form of the Lord could become an object of worship in lieu of worshiping God himself.”

“Take ye: Deu 4:9, Deu 4:23; Jos 23:11; Ch1 28:9, Ch1 28:10; Psa 119:9; Pro 4:23, Pro 4:27; Jer 17:21; Mal 2:15 of similitude: Deu 4:12; Isa 40:18; Co2 4:4-6; Heb 1:3 Deuteronomy 4:16”

“As the Israelites had seen no shape of God at Horeb, they were to beware for their souls' sake (for their lives) of acting corruptly, and making to themselves any kind of image of Jehovah their God, namely, as the context shows, to worship God in it. (On pesel, see at Exo 20:4.) The words which follow, viz., "a form of any kind of sculpture," and "a representation of male or female" (for tabnith, see at Exo 25:9), are in apposition to "graven image," and serve to explain and emphasize the prohibition. Deuteronomy 4:17”