Declension table of ?puruṣottamamantra

Masculine	Singular	Dual	Plural
Nominative	puruṣottamamantraḥ	puruṣottamamantrau	puruṣottamamantrāḥ
Vocative	puruṣottamamantra	puruṣottamamantrau	puruṣottamamantrāḥ
Accusative	puruṣottamamantram	puruṣottamamantrau	puruṣottamamantrān
Instrumental	puruṣottamamantreṇa	puruṣottamamantrābhyām	puruṣottamamantraiḥ puruṣottamamantrebhiḥ
Dative	puruṣottamamantrāya	puruṣottamamantrābhyām	puruṣottamamantrebhyaḥ
Ablative	puruṣottamamantrāt	puruṣottamamantrābhyām	puruṣottamamantrebhyaḥ
Genitive	puruṣottamamantrasya	puruṣottamamantrayoḥ	puruṣottamamantrāṇām
Locative	puruṣottamamantre	puruṣottamamantrayoḥ	puruṣottamamantreṣu

Compound puruṣottamamantra -

Adverb -puruṣottamamantram -puruṣottamamantrāt