Declension table of śāstra

Neuter	Singular	Dual	Plural
Nominative	śāstram	śāstre	śāstrāṇi
Vocative	śāstra	śāstre	śāstrāṇi
Accusative	śāstram	śāstre	śāstrāṇi
Instrumental	śāstreṇa	śāstrābhyām	śāstraiḥ
Dative	śāstrāya	śāstrābhyām	śāstrebhyaḥ
Ablative	śāstrāt	śāstrābhyām	śāstrebhyaḥ
Genitive	śāstrasya	śāstrayoḥ	śāstrāṇām
Locative	śāstre	śāstrayoḥ	śāstreṣu

Compound śāstra -

Adverb -śāstram -śāstrāt