Matsya Purana — The Karmic Cause of Purūravas’ Beauty and Fortune
उपोषितैर्नरैस् तस्मात् स्नानम् अभ्यङ्गपूर्वकम् वर्जनीयं प्रयत्नेन रूपघ्नं तत्परं नृप //
upoṣitairnarais tasmāt snānam abhyaṅgapūrvakam varjanīyaṃ prayatnena rūpaghnaṃ tatparaṃ nṛpa //
Therefore, O king, men who are observing a fast should diligently avoid bathing preceded by oil-anointing (abhyanga), for it is said to diminish the body’s radiance and beauty.
This verse does not discuss Pralaya; it focuses on āchāra (ritual conduct), specifically restrictions for those keeping a fast.
It frames personal discipline as part of dharma: a king/householder observing vows should regulate bodily practices (like oil-anointing baths) to maintain ritual propriety and the intended effect of fasting.
The significance is ritual, not architectural: during upavāsa, an oil-anointing bath (abhyanga-pūrvaka snāna) is advised against, as it is considered to reduce lustre/beauty and counter the vow’s discipline.