Praudhamanorama p35

p35

An example of that which has the marker *ś* is "idama iś" (Pā. sū. 5.3.3), *itaḥ*. As for what the author of the gloss exemplified, namely "jaśśasoḥ śiḥ" (Pā. sū. 7.1.20), that is incorrect, because prior to being a substitute for the whole, the property of having the marker *ś* is not even obtained. For there the established doctrine is that, as in the case of *ḍā* and *ṇal*, being a substitute for the whole is established by this [rule] alone on account of the linear order [of rules]. On "in such as...": By the word "such as", "ato bhisa ais" (Pā. sū. 7.1.9) is included. On "by posteriority": For this very reason it is said that "ādeḥ parasya" (Pā. sū. 1.1.54) is formulated separately. However, the portion "of the following" does operate even in the case of *auś* and *ais*. As for what the older grammarian said while explaining the rule "ādeḥ", namely "by the mention of the ablative", etc., that is manifestly incoherent.
svaritenādhikāraḥ (Pā. sū. 1.3.11)