Agniveshyagrihyasutra 2.1.1.8

2.1.1.8

nyagrodhaśṛṅgaṃ vā ghṛtena kośakārīṃ vā praiyaṅgaveṇa saṃyāvena yūpaśakalaṃ vottarapūrvasyābhiṣṭeragniṃ vā nirmathya mūrmapadhānāya iti tasyā dakṣiṇe nāsikācchidre praṇayet \

Having ground a shoot of a banyan tree with ghee, or a silkworm with groats of priyaṅgu millet, or a splinter of a sacrificial post, or having churned fire from the north-eastern direction, he should insert it into her right nostril with, 'For placing on the head.'