The aṅga (stem) as 'to be' (asyate) gets the augment thuk before this Aorist aṅ,
As आस्थत्, आस्थताम्, आस्थन् ॥ See (III. I. 52).,
अस्यतेस् थुक्
Adhyāya 7 · Pāda 4 · Rule 17
Adhyāya 7 · Pāda 4 · Rule 17
The aṅga (stem) as 'to be' (asyate) gets the augment thuk before this Aorist aṅ,
As आस्थत्, आस्थताम्, आस्थन् ॥ See (III. I. 52).,