Musnad Ahmad 1034:78

Affan narrated to us, Hammad ibn Salamah narrated to us, from Asim, from Zirr, from Hudhayfah, who said: The distance between the two ends of the Basin (Hawd) of the Prophet, may Allah bless him and grant him peace, is like [the distance between] Ayla and Egypt. He mentioned it, and Yunus said the same as what Affan said.