In the self but you were not aware of that incident.In Morning,You say I slept very peacefully.Because in deep sleep there was not knower and known.So,you felt that peace which is eternal.But there was illusion.But in samadhi there is not knower and known,observer and observed.There is consciousness but we are aware of that,eternal bliss.Indian saints say-They are same,Deep sleep and samadhi.But in deep sleep there is ignorance but not in samadhi.