Musnad Abu Ya'la al-Mawsili 115:284

Musa ibn Abd al-Rahman narrated to us, Umar ibn Sa'id narrated to us, from Sa'id, from Qatadah, from Anas, who said: When the Messenger of Allah (peace and blessings of Allah be upon him) would pass through one of the paths of Medina, a scent of musk would be found from it. They would say, "The Messenger of Allah (peace and blessings of Allah be upon him) passed through this path today."