To not make a graven image, an idol, anything in the likeness of man or four footed beasts, etc... anything of God's creation, etc....
Yahveh our God said
in Shemot, Exodus, Chapter 20 Verses 4-6
You shall not make for yourself a carved image-any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth; you shall not bow down to them nor serve them. For I, Yahveh your God, am a jealous God, visiting the iniquity of the fathers upon the children to the third and fourth generations of those who hate Me, but showing mercy to thousands to those who love Me and keep My commandments.
Shalom.
Jacob