Pitṛ-Śrāddha Vidhi: Rājata-dāna, Kṛṣṇājina, and Vedi/Garta Construction
Ancestral Rite Protocols
पत्रोर्णं पट्टसूत्रं च कौशेयं परिवर्जयेत् / वर्जयेद्यक्षणं यज्ञे यद्यप्यहतवस्त्रजाम्
patrorṇaṃ paṭṭasūtraṃ ca kauśeyaṃ parivarjayet / varjayedyakṣaṇaṃ yajñe yadyapyahatavastrajām
Let him avoid patrorṇa, paṭṭa thread, and kauśeya (silk). In the yajña he should refrain from them, even if they are new and unwashed cloth.