Declension table of ?saptya

Neuter	Singular	Dual	Plural
Nominative	saptyam	saptye	saptyāni
Vocative	saptya	saptye	saptyāni
Accusative	saptyam	saptye	saptyāni
Instrumental	saptyena	saptyābhyām	saptyaiḥ
Dative	saptyāya	saptyābhyām	saptyebhyaḥ
Ablative	saptyāt	saptyābhyām	saptyebhyaḥ
Genitive	saptyasya	saptyayoḥ	saptyānām
Locative	saptye	saptyayoḥ	saptyeṣu

Compound saptya -

Adverb -saptyam -saptyāt