Declension table of ?saśastra

Neuter	Singular	Dual	Plural
Nominative	saśastram	saśastre	saśastrāṇi
Vocative	saśastra	saśastre	saśastrāṇi
Accusative	saśastram	saśastre	saśastrāṇi
Instrumental	saśastreṇa	saśastrābhyām	saśastraiḥ
Dative	saśastrāya	saśastrābhyām	saśastrebhyaḥ
Ablative	saśastrāt	saśastrābhyām	saśastrebhyaḥ
Genitive	saśastrasya	saśastrayoḥ	saśastrāṇām
Locative	saśastre	saśastrayoḥ	saśastreṣu

Compound saśastra -

Adverb -saśastram -saśastrāt