Do spellcasters lose spells if they fall unconscious?


Do spellcasters lose spells if they fall unconscious?

By “lose” I mean lose the spells they have in their heads – their memorized spells, or prepared spells. Not looking at concentration, but the spells they have “set” for the day.

I always played that rule in 1e/2e but not seeing a written rule on it in the books.