Declension table of aśāstra

Neuter	Singular	Dual	Plural
Nominative	aśāstram	aśāstre	aśāstrāṇi
Vocative	aśāstra	aśāstre	aśāstrāṇi
Accusative	aśāstram	aśāstre	aśāstrāṇi
Instrumental	aśāstreṇa	aśāstrābhyām	aśāstraiḥ
Dative	aśāstrāya	aśāstrābhyām	aśāstrebhyaḥ
Ablative	aśāstrāt	aśāstrābhyām	aśāstrebhyaḥ
Genitive	aśāstrasya	aśāstrayoḥ	aśāstrāṇām
Locative	aśāstre	aśāstrayoḥ	aśāstreṣu

Compound aśāstra -

Adverb -aśāstram -aśāstrāt