Sunnah of eating of the floor and not sleeping on the floor

It is written in Fatawa Mahmoodia that to sit and eat on the table is against the Sunnat. It is stated in many books that Nabi (S.A.W) should sleep on a bed. What Nabi (S.A.W) did - what he always did - is Sunnat. To use a bed is permissible and not Sunnat; to eat on the floor is Sunnat. Eat on the floor to receive the reward for eating on the floor.