Grammatical Sūtra: उभयथर्क्षु ubhayatharkṣu
Individual Word Components: ubhayathā ṛkṣu
Sūtra with anuvṛtti words: ubhayathā ṛkṣu padasya (8.1.16), pūrvatra (8.2.1), asiddham (8.2.1), saṁhitāyām (8.2.108), ru (8.3.1), anunāsikaḥ (8.3.2), pūrvasya (8.3.2), tu (8.3.2), vā (8.3.2), ampare (8.3.6), naḥ (8.3.7), chavi (8.3.7)
Type of Rule: vidhi
Preceding adhikāra rule:8.3.4 (1anunāsikāt paro 'nusvāraḥ)

Description:

In both ways, in the Rig verses. Source: Aṣṭādhyāyī 2.0

In the domain of R̥gveda both (ubha-yá-thā) [n 7 or its replacement rU l] occur [in continuous utterance 2.108 before 1.1.66 the phonemes ch, ṭh, th, c, ṭ, or t followed by a vowel, semivowel or a nasal stop 7]. Source: From Aṣṭādhyāyī of Pāṇini In Roman Transliteration translated by Sumitra M. Katre, Copyright © 1987. Courtesy of the University of Texas Press.

Source:Srisa Chandra Vasu's Aṣṭādhyāyī of Pāṇini

Anuvṛtti: 8.3.1, 8.3.6, 8.3.7

Kāśikāvṛttī¹: purveṇa nitye prāpte vikalpaḥ kriyate. nakārāntasya padasya chavi parataḥ ampare   See More

Kāśikāvṛttī²: ubhayatha rkṣu 8.3.8 purveṇa nitye prāpte vikalpaḥ kriyate. nakārāntasya padasy   See More

Nyāsa²: ubhayathakrṣu. , 8.3.8 pūrveṇa nitye prāpte vikalpārtha vacanam()॥

1.Source: Arsha Vidya Gurukulam
2.Source: Sanskrit Documents