Declension table of ?śāstradasyu

Masculine	Singular	Dual	Plural
Nominative	śāstradasyuḥ	śāstradasyū	śāstradasyavaḥ
Vocative	śāstradasyo	śāstradasyū	śāstradasyavaḥ
Accusative	śāstradasyum	śāstradasyū	śāstradasyūn
Instrumental	śāstradasyunā	śāstradasyubhyām	śāstradasyubhiḥ
Dative	śāstradasyave	śāstradasyubhyām	śāstradasyubhyaḥ
Ablative	śāstradasyoḥ	śāstradasyubhyām	śāstradasyubhyaḥ
Genitive	śāstradasyoḥ	śāstradasyvoḥ	śāstradasyūnām
Locative	śāstradasyau	śāstradasyvoḥ	śāstradasyuṣu

Compound śāstradasyu -

Adverb -śāstradasyu