ज्येष्ठ-कनिष्ठ-धर्मः — Duties of Elders and Juniors
Anuśāsana-parva 108
संध्यायां च न भुज्जीत न स्नायेन्न तथा पठेत् । प्रयतश्न॒ भवेत् तस्यां न च किंचित् समाचरेत्
saṃdhyāyāṃ ca na bhuñjīta na snāyen na tathā paṭhet | prayataś ca bhavet tasyāṃ na ca kiṃcit samācaret ||
قال بهيشما: عند وقت الشفق (السَّندْهيا)، لا ينبغي الأكل، ولا الاغتسال، ولا الاشتغال بالدراسة أو التلاوة. ففي ذلك الفاصل المقدّس يجب أن يكون المرء متحفظًا، نقيَّ الذهن، مواظبًا على التأمل والعبادة، وألا يباشر عملًا آخر.
भीष्म उवाच
Twilight (saṃdhyā) is to be treated as a dedicated sacred interval: avoid ordinary activities like eating, bathing, and study, and instead remain disciplined and focused on worship/meditation, doing nothing else.
In the Anuśāsana Parva’s dharma-instruction setting, Bhīṣma continues prescribing rules of right conduct, here specifying proper behavior during the saṃdhyā period as part of daily religious discipline.