ज्येष्ठ-कनिष्ठ-धर्मः — Duties of Elders and Juniors
Anuśāsana-parva 108
नक्तं न कुर्यात् पित्र्याणि भुक्त्वा चैव प्रसाधनम्
naktaṁ na kuryāt pitryāṇi bhuktvā caiva prasādhanam
ഭീഷ്മൻ പറഞ്ഞു—രാത്രിയിൽ പിതൃകർമ്മങ്ങൾ ചെയ്യരുത്; ഭക്ഷണം കഴിച്ച ശേഷം പ്രസാധനമോ ശൗച-ശുദ്ധിയുമായി ബന്ധപ്പെട്ട ആചാരസജ്ജീകരണങ്ങളോ ചെയ്യുകയും അരുത്।
भीष्म उवाच
Ritual acts—especially ancestral rites—must be performed at proper times and in a state of appropriate purity; night-time performance and post-meal ritual preparation are discouraged as contrary to prescribed discipline.
In Anuśāsana Parva, Bhishma instructs Yudhishthira on dharma and correct conduct, giving practical rules about śrāddha/Pitṛ-related observances and standards of cleanliness and timing.