ANSWER:

You should say these before sleeping, whether you sleep during the day or at night 

No need to repeat it if you want to sleep again during that day

QUESTION: Adhkaar (ayatul kursi, 4 quls, tasbih fatimah, allahumma aslamtuu, allahumma bismika.I know of these) before sleeping are for sleeping at any time or specifically sleeping before at night?if someone sleeps in the day,or in the morning,has slept before but sleeps again etc.In all these scenarios should one recite adhkaar each time before sleeping?

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