[In the years between 937-937 A.D.] Pope Leo [VII] appoints Frederick, Archbishop of Mainz, as his vicar and legate throughout all the regions of the whole of Germany, so that wherever he shall have discovered bishops, priests, deacons, or monks to have transgressed, he may reprove them and not fail to lead them back to the way of truth.
He permits him to expel the Jews from the cities unless they accept the Christian faith; but he forbids that they be baptized against their will.
Source. Regesta pontificum romanorum – Translated by ChatGPT. Regesta pontificum romanorum, vol.I:3597, Jaffe, Leipzig: 1888.