Declension table of sarayu

Masculine	Singular	Dual	Plural
Nominative	sarayuḥ	sarayū	sarayavaḥ
Vocative	sarayo	sarayū	sarayavaḥ
Accusative	sarayum	sarayū	sarayūn
Instrumental	sarayuṇā	sarayubhyām	sarayubhiḥ
Dative	sarayave	sarayubhyām	sarayubhyaḥ
Ablative	sarayoḥ	sarayubhyām	sarayubhyaḥ
Genitive	sarayoḥ	sarayvoḥ	sarayūṇām
Locative	sarayau	sarayvoḥ	sarayuṣu

Compound sarayu -

Adverb -sarayu