Declension table of ?vratastha

Neuter	Singular	Dual	Plural
Nominative	vratastham	vratasthe	vratasthāni
Vocative	vratastha	vratasthe	vratasthāni
Accusative	vratastham	vratasthe	vratasthāni
Instrumental	vratasthena	vratasthābhyām	vratasthaiḥ
Dative	vratasthāya	vratasthābhyām	vratasthebhyaḥ
Ablative	vratasthāt	vratasthābhyām	vratasthebhyaḥ
Genitive	vratasthasya	vratasthayoḥ	vratasthānām
Locative	vratasthe	vratasthayoḥ	vratastheṣu

Compound vratastha -

Adverb -vratastham -vratasthāt