Declension table of śastraśāstra

Neuter	Singular	Dual	Plural
Nominative	śastraśāstram	śastraśāstre	śastraśāstrāṇi
Vocative	śastraśāstra	śastraśāstre	śastraśāstrāṇi
Accusative	śastraśāstram	śastraśāstre	śastraśāstrāṇi
Instrumental	śastraśāstreṇa	śastraśāstrābhyām	śastraśāstraiḥ
Dative	śastraśāstrāya	śastraśāstrābhyām	śastraśāstrebhyaḥ
Ablative	śastraśāstrāt	śastraśāstrābhyām	śastraśāstrebhyaḥ
Genitive	śastraśāstrasya	śastraśāstrayoḥ	śastraśāstrāṇām
Locative	śastraśāstre	śastraśāstrayoḥ	śastraśāstreṣu

Compound śastraśāstra -

Adverb -śastraśāstram -śastraśāstrāt