(Devarim 23:19) "You shall not bring the hire of a prostitute and the exchange of a dog into the house of the L-rd your G-d for every vow": "You shall not bring the hire of a prostitute": This tells me of the hire of a prostitute. Whence do we derive (the same for) the hire of all of the arayoth (illicit relations)? From "for the abomination" — in any event. And which is "the hire of a prostitute"? Saying to a prostitute "Take this (lamb) for your hire" — even (if he sent her) one hundred, they are all forbidden. If one says to his neighbor: Take this lamb and let your (Canaanite) maidservant lie with my (unmarried Hebrew) manservant — Rebbi says: This is not hire; the sages say: It is hire.