Sayyiduna Sufyan bin Abi Zuhayr al-Azdi (may Allah be pleased with him) narrates: I heard the Messenger of Allah (peace and blessings be upon him) say: "Yemen will be conquered, and some people will come driving (their animals), and they will take away their families and those who follow them, although Madinah would be better for them, if only they knew. Then Iraq will be conquered, and some people will come driving (their animals), and they will take away their families and those who follow them, although Madinah would be better for them, if only they knew. Then Syria will be conquered, and some people will come driving (their animals), and they will take away their families and those who follow them, although Madinah would be better for them, if only they knew."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6379