6.4.76
इरयो रे
Operational rule vidhi
रे is diversely substituted for इरे in the छन्दस् (Vedas).
Word by word (padaccheda)
Target इरयोः ṣaṣṭhī · dvivacanaWord रे
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Word Case not marked in the source data.
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Full reading
इरयोः रे
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
रे is diversely substituted for इरे in the छन्दस् (Vedas).
Thus कं स्विद्गर्भं प्रथमं दध्रे आपः (Rig X. 82.5) या स्य परिदध्रे ॥ In दध्रे, the आ of धा is elided before the affix इरे by 6.4.64, the रे substitution being considered as asiddha 6.4.22 for the purposes of the elision of आ ॥ Sometimes the substitution does not take place, as परमाया धियोग्निर्म्माणि चक्रिरे ॥ Here इट् augment is first added to रे after the सेट् roots and the affix thus becomes इरे, then रे is substituted again for this इरे by this sutra, thus the affix is brought back to its original condition. To show this repetition — रे — इरे — रे the sutra has exhibited the word इरयोः in the dual number.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.