Declension table of ?sāpayiṣyat

Masculine	Singular	Dual	Plural
Nominative	sāpayiṣyan	sāpayiṣyantau	sāpayiṣyantaḥ
Vocative	sāpayiṣyan	sāpayiṣyantau	sāpayiṣyantaḥ
Accusative	sāpayiṣyantam	sāpayiṣyantau	sāpayiṣyataḥ
Instrumental	sāpayiṣyatā	sāpayiṣyadbhyām	sāpayiṣyadbhiḥ
Dative	sāpayiṣyate	sāpayiṣyadbhyām	sāpayiṣyadbhyaḥ
Ablative	sāpayiṣyataḥ	sāpayiṣyadbhyām	sāpayiṣyadbhyaḥ
Genitive	sāpayiṣyataḥ	sāpayiṣyatoḥ	sāpayiṣyatām
Locative	sāpayiṣyati	sāpayiṣyatoḥ	sāpayiṣyatsu

Compound sāpayiṣyat -

Adverb -sāpayiṣyantam