Declension table of ?apastana

Neuter	Singular	Dual	Plural
Nominative	apastanam	apastane	apastanāni
Vocative	apastana	apastane	apastanāni
Accusative	apastanam	apastane	apastanāni
Instrumental	apastanena	apastanābhyām	apastanaiḥ
Dative	apastanāya	apastanābhyām	apastanebhyaḥ
Ablative	apastanāt	apastanābhyām	apastanebhyaḥ
Genitive	apastanasya	apastanayoḥ	apastanānām
Locative	apastane	apastanayoḥ	apastaneṣu

Compound apastana -

Adverb -apastanam -apastanāt