Declension table of ?ṣaṭsapta

Masculine	Singular	Dual	Plural
Nominative	ṣaṭsaptaḥ	ṣaṭsaptau	ṣaṭsaptāḥ
Vocative	ṣaṭsapta	ṣaṭsaptau	ṣaṭsaptāḥ
Accusative	ṣaṭsaptam	ṣaṭsaptau	ṣaṭsaptān
Instrumental	ṣaṭsaptena	ṣaṭsaptābhyām	ṣaṭsaptaiḥ ṣaṭsaptebhiḥ
Dative	ṣaṭsaptāya	ṣaṭsaptābhyām	ṣaṭsaptebhyaḥ
Ablative	ṣaṭsaptāt	ṣaṭsaptābhyām	ṣaṭsaptebhyaḥ
Genitive	ṣaṭsaptasya	ṣaṭsaptayoḥ	ṣaṭsaptānām
Locative	ṣaṭsapte	ṣaṭsaptayoḥ	ṣaṭsapteṣu

Compound ṣaṭsapta -

Adverb -ṣaṭsaptam -ṣaṭsaptāt