פירוש על עבודה זרה 53:15

The meaning of this mishnah is quite cryptic. The Talmud will explain it later on.

According to Rabbi Meir a Jew may never get his hair cut by a non-Jew, lest the non-Jew kill him with the scissors or razor. The Sages say that this is prohibited only in private. In public the non-Jew would not dare to kill the Jew.