וַיֹּ֤אמֶר יְהוָה֙ אֶל־מֹשֶׁ֔ה אֱמֹ֥ר אֶל־הַכֹּהֲנִ֖ים בְּנֵ֣י אַהֲרֹ֑ן וְאָמַרְתָּ֣ אֲלֵהֶ֔ם לְנֶ֥פֶשׁ לֹֽא־יִטַּמָּ֖א בְּעַמָּֽיו׃
Y el Señor le dijo a Moisés: Habla a los sacerdotes hijos de Aarón, y diles <span class="x" onmousemove="Show('perush','Este es el <b>166to Precepto Negativo</b> enumerado por el Rambam en el Prefacio a Mishné Torá, su “Compendio de la Ley Hebrea” para todo el Pueblo de Israel.',event);" onmouseout="Close();">que no se contaminen por un muerto en sus pueblos</span>.
Zohar
AND THE LORD SAID UNTO MOSES, SPEAK UNTO THE PRIESTS THE SONS OF AARON AND SAY UNTO THEM, THERE SHALL NONE DEFILE HIMSELF FOR THE DEAD AMONG HIS PEOPLE. R. Jose said: ‘What is the connection of this with the verse that immediately precedes, “A man also or a woman that hath a familiar spirit or that is a wizard shall be put to death” (Lev. 20, 27)? It is this: that having admonished the Israelites to sanctify themselves, the Scripture now admonishes the priests to sanctify themselves specially. Later, too, it admonishes the Levites (Num. 18, 21 et seq.), so that all should become holy and pure.