Musnad Abu Ya'la al-Mawsili 248:37

Abu Hammam narrated to us, he said: My father narrated to me, Ziyad bin Khaythama narrated to us, from Simak bin Harb, from Jabir bin Samurah, from the Messenger of Allah (may Allah bless him and grant him peace), who said: "I am your forerunner at the Basin (al-Hawd), and the distance between its two sides is like that between San'a and Ayla. The pitchers are like the stars."