Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him): "The Hour will not be established until you fight those who wear shoes of hair, and those with small eyes and flat noses, as though their faces were shields layered one upon another."
(b) Shu'ayb bin Abi Hamzah (may Allah have mercy on him) narrates from Abu al-Zinad (may Allah have mercy on him): "Until you wage jihad against the Turks, who have small eyes and red faces."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18593