ay is optionally substituted for the i of ṇi before the Absolutive affix lyap , after the verb āp,
Thus प्रापय्य or प्राप्य गतः ॥ This however does not apply to the आप् substitute for इङ्, as अप्याप्य गतः (VI. I. 48), 7.3.36. The maxim of Pratipadokta applies here.,