Kitab al-Fitan · Nu'aym ibn Hammad

A fire is about to break out in Yemen, taking people to the Levant. It will come in the morning when they start, and go to bed when they say, and leave when they leave. It will light up the necks of camels in Busra, so if you hear that, go out to the Levant.

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "The Hour will not be established till a fire will come out of the land of Hijaz, and it will throw light on the necks of the camels at Busra