Abu Dawud Book 36, Hadith Number 5036.
Chapter : Not known.
Narated By AbuHurayrah : The Prophet (PBUH) said: If anyone lies on his side where he does not remember Allah, deprivation will descend on him on the Day of Resurrection; and if anyone sits in a place where he does not remember Allah, deprivation will descend on him on the Day of Resurrection.