6.1.139 उपात् प्रतियत्नवैकृतवाक्याध्याहारेषु

Word by word (padaccheda)

Left context उपात् pañcamī · ekavacanaRight context प्रतियत्न- वैकृत- वाक्याध्याहारेषु saptamī · bahuvacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").

Full reading

उपात् प्रतियत्न-वैकृत-वाक्याध्याहारेषु

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The augment सुट् is placed before क , when the verb कृ comes after उप , and the sense is that of 'to take pains for something, to prepare, and to supply and ellipses in a discourse'.
To take pains in imparting a new quality to a thing in order to increase its value, or to keep it safe from deterioration is called प्रतियत्नः ॥ That which is prepared or altered is called वैकृतं ॥ The word वैकृतं is the same as विकृतं, the affix अण् being added without changing the sense, by considering it to belong to प्रज्ञादि class 5.4.38. To supply by distinct statement the sense of a sentence which is alluded to, is called the अध्याहार of a sentence. Thus in the sense of 'taking pains' we have एधोदकस्योपस्कुरुते (See 1.3.32); काण्डगुणस्योपस्कुरुते ॥ In the sense of 'altering by preparing' we have: उपस्कृतं भुङ्क्ते, उपस्कृतं गच्छति ॥ In the sense of 'supplying a thesis' we have उपस्कृतं जल्पति, उपस्कृतमधीते ॥ When not having any one of the above five senses 6.1.137 - 6.1.139 we have उपकरोति ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.