Musnad Ahmad 25:1213

'Abd al-Razzaq narrated to us, Isra'il informed us, from Simak, from 'Ikrimah, from Ibn 'Abbas: "The Quraysh came to a female soothsayer and said to her: 'Inform us who among us is the closest in resemblance to the owner of this station (the Maqam).' She said: 'If you drag a garment over this sandy ground, then walk upon it, I will inform you.' They dragged it, then the people walked upon it. She looked at the footprint of Muhammad, peace and blessings of Allah be upon him, and said: 'This is the closest of you in resemblance to him.' They remained after that for twenty years, or near twenty years, or whatever Allah willed, then he, peace and blessings of Allah be upon him, was sent."