Declension table of ?puruṣāstha

Neuter	Singular	Dual	Plural
Nominative	puruṣāstham	puruṣāsthe	puruṣāsthāni
Vocative	puruṣāstha	puruṣāsthe	puruṣāsthāni
Accusative	puruṣāstham	puruṣāsthe	puruṣāsthāni
Instrumental	puruṣāsthena	puruṣāsthābhyām	puruṣāsthaiḥ
Dative	puruṣāsthāya	puruṣāsthābhyām	puruṣāsthebhyaḥ
Ablative	puruṣāsthāt	puruṣāsthābhyām	puruṣāsthebhyaḥ
Genitive	puruṣāsthasya	puruṣāsthayoḥ	puruṣāsthānām
Locative	puruṣāsthe	puruṣāsthayoḥ	puruṣāstheṣu

Compound puruṣāstha -

Adverb -puruṣāstham -puruṣāsthāt