Mukhtasar Bukhari

Narrated Abu Huraira (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said: "The Hour will not be established until my Ummah adopts the ways of the previous nations, hand span by hand span and arm's length by arm's length (i.e., exactly)." Someone asked, "O Messenger of Allah! Do you mean the Persians and the Christians from the previous nations?" He (peace be upon him) replied: "Then who else?"