Ābhūta-saṃplava & Loka-vibhāga
Dissolution Threshold and the Fourteen Abodes
त्रसरेणवो ऽथ ये ऽप्यष्टौ रथरेणुस्तु सस्मृतः / ते ऽप्यष्टौ समवायस्था बालाग्रं तत्स्मृतं बुधैः
trasareṇavo 'tha ye 'pyaṣṭau rathareṇustu sasmṛtaḥ / te 'pyaṣṭau samavāyasthā bālāgraṃ tatsmṛtaṃ budhaiḥ
Next, eight trasareṇus together are remembered as a rathareṇu; and the aggregation of eight of those, the wise declare, is bālāgra—the tip of a hair.