Declension table of ?saptasūtra

Neuter	Singular	Dual	Plural
Nominative	saptasūtram	saptasūtre	saptasūtrāṇi
Vocative	saptasūtra	saptasūtre	saptasūtrāṇi
Accusative	saptasūtram	saptasūtre	saptasūtrāṇi
Instrumental	saptasūtreṇa	saptasūtrābhyām	saptasūtraiḥ
Dative	saptasūtrāya	saptasūtrābhyām	saptasūtrebhyaḥ
Ablative	saptasūtrāt	saptasūtrābhyām	saptasūtrebhyaḥ
Genitive	saptasūtrasya	saptasūtrayoḥ	saptasūtrāṇām
Locative	saptasūtre	saptasūtrayoḥ	saptasūtreṣu

Compound saptasūtra -

Adverb -saptasūtram -saptasūtrāt