It is unfit because it is a mitzva that comes to be fulfilled by means of a transgression, which renders the mitzva unfulfilled, as it is stated: “And you have brought that which was stolen and the lame, and the sick; that is how you bring the offering; should I accept this of your hand? says the Lord” (Malachi 1:13). Based on the juxtaposition in the verse, it is derived that the legal status of a stolen animal is equivalent to that of a lame animal. Just as a lame animal, because it is blemished, has no remedy and is unfit for use, so too, a stolen animal has no remedy. There is no difference before the owners reach a state of despair of recovering the stolen animal, and there is no difference after despair. In both cases there is no remedy.

The Gemara elaborates: Granted, before the despair of the owner, the robber may not sacrifice the animal because the animal does not belong to him. The Merciful One says: “When a person sacrifices from yours an offering” (Leviticus 1:2). The term “from yours” indicates that the animal must belong to the one sacrificing it, and this stolen animal is not his. However, after the despair of the owner, didn’t the robber acquire the animal with the despair? Once the owner despairs, the animal belongs to the robber, despite the fact that he incurs a debt that he must repay the owner. Since the animal is legally his, why is it prohibited for the robber to sacrifice it as an offering? Rather, is it not because the offering is a mitzva that comes by means of a transgression? Since the animal came into his possession by means of a transgression, it is unfit for use in fulfilling a mitzva.

And Rabbi Yoḥanan said in the name of Rabbi Shimon ben Yoḥai: What is the meaning of that which is written: “For I the Lord love justice, I hate robbery in a burnt-offering” (Isaiah 61:8)? The Gemara cites a parable of a flesh-and-blood king who was passing by a customs house. He said to his servants: Pay the levy to the taxmen. They said to him: Doesn’t all the tax in its entirety belong to you? If the taxes will ultimately reach the royal treasury, what is the point of paying the levy? He said to them: From my conduct, all travelers will learn and will not evade payment of the tax. So too, the Holy One, Blessed be He, said: “I the Lord... hate robbery in a burnt-offering.” Although the whole world is His and the acquisitions of man have no impact upon Him, God says: From My conduct, My children will learn and distance themselves from robbery, even from robbery unrelated to the needs of offerings.

It was also stated: Rabbi Ami said: A dry lulav is unfit because it does not meet the criterion of beauty, and a stolen lulav is unfit because it is a mitzva that comes by means of a transgression.

The Gemara notes: And Rabbi Ami disagrees with the opinion of Rabbi Yitzḥak, as Rabbi Yitzhak bar Naḥmani said that Shmuel said: The Sages taught that the halakha that a stolen lulav is unfit applies only with regard to the first day of the festival of Sukkot. However, beginning on the second day of the Festival, there is no longer a Torah requirement to use a lulav from one’s own property. Since one fulfills his obligation with a borrowed lulav, one fulfills his obligation with a stolen one as well.

Rabbi Naḥman bar Yitzḥak raises an objection from the mishna: A lulav that was stolen or that is completely dry is unfit. By inference, one concludes that a borrowed lulav is fit for use. The Gemara asks: When does this halakha apply? If you say that it applies only on the first day of the Festival, isn’t it written: “And you shall take for yourselves on the first day,” indicating that the four species must be taken from your own property, and this borrowed lulav is not his? Clearly, the mishna is not referring to the first day. Rather, is it not that the mishna is referring to the second day of the Festival, and the mishna teaches that a stolen lulav is unfit on this day too, contrary to Shmuel’s opinion?

Rava said: Actually, the mishna can be explained as referring to the first day of the Festival, and the tanna is stating the halakha employing the didactic style: It was not necessary. It was not necessary to state that one does not fulfill his obligation with a borrowed lulav, as it is not his. However, with regard to a stolen lulav, say: Barring extraordinary circumstances, standard robbery is a case that leads to despair of the owners, and despite the fact that a stolen lulav was acquired by means of a transgression, its legal status is like the robber’s own property. Therefore, the mishna teaches us that this is not so. One does not fulfill his obligation with a stolen lulav. The mishna is not a refutation of Shmuel’s opinion.

§ Apropos the unfitness of four species acquired through robbery, the Gemara relates: Rav Huna said to the merchants [avankarei] selling the four species: When you purchase myrtle branches from gentiles, don’t you cut them off the tree? Rather, let the gentiles cut them and give them to you. What is the reason for this advice? It is because typical gentiles are land robbers,