न स्नानमाचरेद्भुक्त्वा नातुरो न महानिशि ।
न वासोभिः सहाजस्रं ना विज्ञाते जलाशये ॥
- मनुस्मृति
This is a verse about when a person can take bath. Not after having food, not in a hurry, not at mid night, not with the clothes on, not in a unknown lake (pond or well).
- Manu Smriti