Declension table of ?yathāgata

Neuter	Singular	Dual	Plural
Nominative	yathāgatam	yathāgate	yathāgatāni
Vocative	yathāgata	yathāgate	yathāgatāni
Accusative	yathāgatam	yathāgate	yathāgatāni
Instrumental	yathāgatena	yathāgatābhyām	yathāgataiḥ
Dative	yathāgatāya	yathāgatābhyām	yathāgatebhyaḥ
Ablative	yathāgatāt	yathāgatābhyām	yathāgatebhyaḥ
Genitive	yathāgatasya	yathāgatayoḥ	yathāgatānām
Locative	yathāgate	yathāgatayoḥ	yathāgateṣu

Compound yathāgata -

Adverb -yathāgatam -yathāgatāt