Declension table of ?saptatha

Masculine	Singular	Dual	Plural
Nominative	saptathaḥ	saptathau	saptathāḥ
Vocative	saptatha	saptathau	saptathāḥ
Accusative	saptatham	saptathau	saptathān
Instrumental	saptathena	saptathābhyām	saptathaiḥ saptathebhiḥ
Dative	saptathāya	saptathābhyām	saptathebhyaḥ
Ablative	saptathāt	saptathābhyām	saptathebhyaḥ
Genitive	saptathasya	saptathayoḥ	saptathānām
Locative	saptathe	saptathayoḥ	saptatheṣu

Compound saptatha -

Adverb -saptatham -saptathāt