It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Those people who gather in a place for a meeting but do not remember Allah in it, it will be a cause of regret for them on the Day of Resurrection. And any person who walks on a path but does not remember Allah while walking, that walking too will be a cause of regret for him on the Day of Resurrection. And any person who comes to his bed but does not remember Allah, that too will be a cause of regret for him.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9583