Musannaf Ibn Abi Shayba 37:211

Mu'awiyah ibn 'Amr narrated to us, from Za'idah, from al-A'mash, from 'Amr, from 'Abdullah ibn al-Harith, from Habib ibn Jammaz, from Abu Dharr, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "I wish I knew when a fire will emerge from the direction of al-Warraq, by which the necks of the camels in Busra will be illuminated while they are kneeling, like the light of day."