Musannaf Ibn Abi Shayba 3:5159

Waki’ narrated to us, from Sufyan, from Abu al-Miqdam, from Hayya, who said: A man came to Ali and said, "I have bought a camel and prepared myself, intending to go to Bayt al-Maqdis (Jerusalem)." Ali said, "Sell your camel and pray in this mosque," meaning the Mosque of Kufa. "For there is no mosque after the Sacred Mosque (al-Masjid al-Haram) and the Mosque of Medina that is more beloved to me than it. And it has been reduced from what it was founded upon by five hundred cubits," meaning the Mosque of Kufa.