Declension table of ?parvatastha

Masculine	Singular	Dual	Plural
Nominative	parvatasthaḥ	parvatasthau	parvatasthāḥ
Vocative	parvatastha	parvatasthau	parvatasthāḥ
Accusative	parvatastham	parvatasthau	parvatasthān
Instrumental	parvatasthena	parvatasthābhyām	parvatasthaiḥ parvatasthebhiḥ
Dative	parvatasthāya	parvatasthābhyām	parvatasthebhyaḥ
Ablative	parvatasthāt	parvatasthābhyām	parvatasthebhyaḥ
Genitive	parvatasthasya	parvatasthayoḥ	parvatasthānām
Locative	parvatasthe	parvatasthayoḥ	parvatastheṣu

Compound parvatastha -

Adverb -parvatastham -parvatasthāt