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今夜は早くおやすみください
Please go to bed early tonight.
A polite way to say 'good night' when addressing someone you respect or are not very close to.
先生、今日は疲れましたので、おやすみください
Teacher, I'm tired today, so good night.
This phrase is more formal than 'おやすみ' alone, which is used with friends and family.
Use 'おやすみください' with people you respect, and 'おやすみ' with friends and family.
From 'おやすみ' (good night) + 'ください' (please).
Use this phrase when saying good night to someone you respect, such as a teacher, boss, or elder.