Pitṛ-Śrāddha Vidhi: Rājata-dāna, Kṛṣṇājina, and Vedi/Garta Construction
Ancestral Rite Protocols
रत्निमात्राः प्रमाणेन वितृतीर्थेन संस्मृताः / उपमूले तथा नीला विष्टरार्थं कुशोत्तमाः
ratnimātrāḥ pramāṇena vitṛtīrthena saṃsmṛtāḥ / upamūle tathā nīlā viṣṭarārthaṃ kuśottamāḥ
By the measure of a ratni (a hand’s breadth) it is remembered as the Vitṛtīrtha. Near the root it should be bluish; for spreading out, the finest kuśa grass is to be used.