Śrāddha-kalpa: Dāna-phala, Medhya/Amedhya Dravya, and Uparāga
Eclipse) Observances (श्राद्धकल्पः—दानफल-मेध्यामेध्य-उपरागविधिः
विना यज्ञोपवीतेन मोघं तत्समुपस्पृशेत् / उष्ट्रस्यावेश्च संस्पर्शे दर्शने ऽवाच्यवाचिनाम्
vinā yajñopavītena moghaṃ tatsamupaspṛśet / uṣṭrasyāveśca saṃsparśe darśane 'vācyavācinām
Ācamana performed without the yajñopavīta is fruitless; and purification is prescribed upon touching a camel or a sheep, and upon seeing those who utter unutterable, impure speech.