Declension table of ?sāpāya

Masculine	Singular	Dual	Plural
Nominative	sāpāyaḥ	sāpāyau	sāpāyāḥ
Vocative	sāpāya	sāpāyau	sāpāyāḥ
Accusative	sāpāyam	sāpāyau	sāpāyān
Instrumental	sāpāyena	sāpāyābhyām	sāpāyaiḥ sāpāyebhiḥ
Dative	sāpāyāya	sāpāyābhyām	sāpāyebhyaḥ
Ablative	sāpāyāt	sāpāyābhyām	sāpāyebhyaḥ
Genitive	sāpāyasya	sāpāyayoḥ	sāpāyānām
Locative	sāpāye	sāpāyayoḥ	sāpāyeṣu

Compound sāpāya -

Adverb -sāpāyam -sāpāyāt