Declension table of saptaka

Masculine	Singular	Dual	Plural
Nominative	saptakaḥ	saptakau	saptakāḥ
Vocative	saptaka	saptakau	saptakāḥ
Accusative	saptakam	saptakau	saptakān
Instrumental	saptakena	saptakābhyām	saptakaiḥ
Dative	saptakāya	saptakābhyām	saptakebhyaḥ
Ablative	saptakāt	saptakābhyām	saptakebhyaḥ
Genitive	saptakasya	saptakayoḥ	saptakānām
Locative	saptake	saptakayoḥ	saptakeṣu

Compound saptaka -

Adverb -saptakam -saptakāt