Musar על אבות 1:11

Perhaps I may be so bold as to say that Moses personally observed what Avtalyon in Avot 1,11 warned against when he said: הזהרו בדבריכם שמא תחובו חובת גלות, "Be very careful with your words lest you become guilty of having to exile yourselves." We have another Mishnah, Avot 4,14, in which Rabbi Nehorai warns that it is better to exile oneself to a place where Torah is studied. When Moses saw that he was guilty of exile, he decided to become a constant source of Torah so that any place that he found himself at would fit the description of מקום תורה. By positioning the paragraph about the cities of refuge, i.e. exile, between two paragraphs extolling the gift of Torah he vicariously complied with the advice of Rabbi Nehorai.