6 After having laid aside the title of abbot, he bid farewell to the monks, his brothers, despite their insistence and their tears. He left and travelled by land across many countries and by the unknown routes of the sea, happily reaching the See of the Apostle Peter. There he addressed the venerable pope, Gregory II, "recounted his voyage to him, his reason for coming, and the desire which tormented him for such a long time." The holy pope, "face smiling and eyes filled with goodness," embraced the saint. He did not speak to him only one time but "every day he had important discussions with him." Finally, in the grandest language and with official letters, he conferred on him the mission of preaching the Gospel to the German people.
Source: In Hac Tanta (Vatican.va)