There is luk elision of the affix denoting 'born therein' after a word ending in sthāna and after the words 1. gośāla and 2. kharaśāla,
Thus गोस्थाने जातः = गोस्थानः, अश्वस्थानः, गोशालः, खरशालः ॥,
स्थानानत-गोशाल-खरशालाच् च
Adhyāya 4 · Pāda 3 · Rule 35