Musnad Ahmad 32:1318

Azhar ibn al-Qasim and Abd al-Wahhab narrated to us, they said: Hisham narrated to us, from Qatadah, from Anas, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "The likeness of what is between the two sides of my Basin is like what is between Sana'a and Medina," or "like what is between Medina and Amman." Abd al-Wahhab said: Hisham was uncertain.