1. "And Hashem said to Moses, Speak to the priests the sons of Aaron, and say to them, There shall none be defiled for the dead among his people" (Vayikra 21:1). Rabbi Yosi said, What is the reason that this corresponds with that which is said before, "A man also or woman that is a medium or a wizard, shall surely be put to death" (Vayikra 20:27), so that THE VERSE, "Speak to the priests" is adjacent to it? HE REPLIES: Once admonishing Yisrael to sanctify themselves in every manner, it also admonished the priests to sanctify themselves and the Levites as well. How do we know it admonished the priests? From the words, "Speak to the priests." And as for the Levites, it says, "Thus speak to the Levites, and say to them" (Bemidbar 18:26). Thus they will all be righteous, holy and pure.