Sayyiduna Anas (Radiyallahu Anho) narrates
that Rasulullah (Sallallahu Alaihi Wasallam) said:
The Hour of the Day of Resurrection will not come
until there will be no one left in the world who says
ALLAH,
ALLAH.
And in another narration:
The Hour of the Day of Resurrection will not be
established so long as there is someone saying,
ALLAH,
ALLAH
{ Muslim }