The Sages taught that it is not necessary to say that precludes bribery by means of money, and even verbal bribery is also prohibited. The law that a bribe is not necessarily monetary was be derived from the fact that does not say: “And you shall take no profit.” The Gemara illustrated this by telling how Samuel was once crossing a river on a ferry and a certain man gave him a hand to help him out of the ferryboat. Samuel asked him what he was doing in the place, and when the man told Samuel that he had a case to present before Samuel, Samuel told him that he was disqualified from presiding over the case, as the man did Samuel a favor, and although no money changed hands, a bond had been formed between them. Similarly, the Gemara told that Amemar disqualified himself from presiding over the case of a person who removed a feather from Amemar's head, and Mar Ukva disqualified himself from presiding over the case of a person who covered spittle that was lying before Mar Ukva.