Halakhah zu Dewarim 7:26

In this prevention of wine libations, both Rambam (in Sefer HaMitzvot LaRambam, Mitzvot Lo Taase 194), may his memory be blessed, and Ramban (in his gloss to the Sefer HaMitzvot), may his memory be blessed, conceded that there is a negative commandment in this and that it is counted in the tally of the negative commandments. However they did disagree about it in the [following] matter: that Rambam extracts the prohibition of wine libations from the verse that is written in Parshat Haazinu (Deuteronomy 32:38), "drank the wine of their libations"; and the prohibition of other gifts to idolatry from, "Nothing is to cling to your hand from the anathema"(Deuteronomy 13:18) and from "You shall not bring an abomination" (Deuteronomy 7:26); [whereas] Ramban, may his memory be blessed, wrote that we learn the prohibition of all of the gifts of idolatry from this verse of "Guard yourself," and wine libations are included. And I have written this verse, like his opinion - not like my custom in all of the book, as I have written all [of the other verses] according to the opinion of Rambam, may his memory be blessed. But in this [case] I saw that this verse is very fit to expound the matter from it; and also that there is a warning in it. And [it is] as they, may their memory be blessed, said (Eruvin 96a), [that] every place where it states, "guard yourself," or "lest" or "do not," it is nothing but a negative commandment. However in the verse, "drank the wine of their libations," there is no warning. And I also saw great ones from the enumerators of the commandment that wrote like this.

To not benefit from an offering to idolatry: That we not have anything of idolatry cling with our money, to benefit from it. And about this is it stated (Deuteronomy 7:26), "And you shall not bring an abhorrent thing into your house, etc."

And [also] included in this commandment is that a person should not have cling to his money that God has graced him with justly, other money that is from theft, extortion, interest or from any ugly thing; since all of this is included in the auxiliaries of idolatry. As the evil impulse of a man's heart desires it and brings it to his house - and the evil impulse is called by the name, idolatry; and like they, may their memory be blessed, said (Bava Batra 10a) that about it is it stated (Deuteronomy 15:9), "lest there be a wanton thing with your heart," and it is written about the matter of idolatry (Deuteronomy 13:14), "Wanton men have gone out from you and have induced, etc." And about monies like this that we mentioned and about the auxiliaries of idolatry - about all of them - is it stated (Deuteronomy 7:26), "and you will be an anathema like it"; meaning to say that all that clings to it is anathema. As the blessing of God is not found in it, and [so] it disappears and is lost; like the matter that they, may their memory be blessed, said (Bava Metzia 71a) that a small coin of interest makes several treasuries of money disappear. As this comes and destroys that.