Talmud su Salmi 106:35

Avtalyon would say: Sages! Be careful with your words. For perhaps people will teach things in your name that are not in accordance with the proper study of Torah. Then you will come to deserve exile, and be exiled to a place of poisoned waters. And then even the students who come after you may teach something in your names that is not in accordance with the proper study of Torah, and then you will have caused them to deserve exile, and they will be exiled to a place of poisoned waters. And what are these poisoned waters? This is what is spoken of (Psalms 106:35), “They will become mixed up among the nations, and they will learn their ways.” Others say that [the term] poisoned waters is to be taken literally. And there are those who say that perhaps it means hard labor.