Declension table of ?saptamīya

Neuter	Singular	Dual	Plural
Nominative	saptamīyam	saptamīye	saptamīyāni
Vocative	saptamīya	saptamīye	saptamīyāni
Accusative	saptamīyam	saptamīye	saptamīyāni
Instrumental	saptamīyena	saptamīyābhyām	saptamīyaiḥ
Dative	saptamīyāya	saptamīyābhyām	saptamīyebhyaḥ
Ablative	saptamīyāt	saptamīyābhyām	saptamīyebhyaḥ
Genitive	saptamīyasya	saptamīyayoḥ	saptamīyānām
Locative	saptamīye	saptamīyayoḥ	saptamīyeṣu

Compound saptamīya -

Adverb -saptamīyam -saptamīyāt