Sunan Abu Dawud
4303
Sahih+3

Abu Hurairah reported the Prophet (May peace be upon him) as saying:The last hour will not come before the Muslims fight with the Turks, a people whose faces look as if they were shields covered with skin, and who will wear sandals of hair

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid