Declension table of ?saptahan

Neuter	Singular	Dual	Plural
Nominative	saptahaḥ	saptahnī saptahanī	saptahāni
Vocative	saptahaḥ	saptahnī saptahanī	saptahāni
Accusative	saptahaḥ	saptahnī saptahanī	saptahāni
Instrumental	saptahnā	saptahobhyām	saptahobhiḥ
Dative	saptahne	saptahobhyām	saptahobhyaḥ
Ablative	saptahnaḥ	saptahobhyām	saptahobhyaḥ
Genitive	saptahnaḥ	saptahnoḥ	saptahnām
Locative	saptahni saptahani	saptahnoḥ	saptahaḥsu

Compound saptahar - saptahas -

Adverb -saptahar