Declension table of sāpatnya

Neuter	Singular	Dual	Plural
Nominative	sāpatnyam	sāpatnye	sāpatnyāni
Vocative	sāpatnya	sāpatnye	sāpatnyāni
Accusative	sāpatnyam	sāpatnye	sāpatnyāni
Instrumental	sāpatnyena	sāpatnyābhyām	sāpatnyaiḥ
Dative	sāpatnyāya	sāpatnyābhyām	sāpatnyebhyaḥ
Ablative	sāpatnyāt	sāpatnyābhyām	sāpatnyebhyaḥ
Genitive	sāpatnyasya	sāpatnyayoḥ	sāpatnyānām
Locative	sāpatnye	sāpatnyayoḥ	sāpatnyeṣu

Compound sāpatnya -

Adverb -sāpatnyam -sāpatnyāt